CN110082166B - Full-automatic radioactive aerosol sampling, measuring and analyzing system - Google Patents
Full-automatic radioactive aerosol sampling, measuring and analyzing system Download PDFInfo
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- CN110082166B CN110082166B CN201810075462.8A CN201810075462A CN110082166B CN 110082166 B CN110082166 B CN 110082166B CN 201810075462 A CN201810075462 A CN 201810075462A CN 110082166 B CN110082166 B CN 110082166B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/2202—Devices for withdrawing samples in the gaseous state involving separation of sample components during sampling
- G01N1/2205—Devices for withdrawing samples in the gaseous state involving separation of sample components during sampling with filters
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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Abstract
The invention relates to a full-automatic radioactive aerosol sampling, measuring and analyzing system which comprises a filter paper automatic conveying and recovering module, an aerosol sampling module, an analyzing and measuring module and a control module. These individual modules are of modular design and are suitable for being transported independently of one another.
Description
Technical Field
The invention relates to a full-automatic radioactive aerosol sampling, measuring and analyzing system.
Background
Patent document CN206348174U discloses a radioactive aerosol sampling and measuring instrument.
The radioactive aerosol sampling and measuring instrument adopts an integrated design scheme, so the radioactive aerosol sampling and measuring instrument is heavy, is not beneficial to multipurpose application, and is particularly not suitable for vehicle-mounted use.
In the radioactive aerosol sampling measuring instrument described above, the opening of the lead chamber faces the measurement analyzer, and thus the accuracy of the measurement result may be affected by the measurement analyzer.
In the above radioactive aerosol sampling measuring instrument, 3 tension sensors are used to detect and control the tension in the filter paper, thus increasing the difficulty of control and resulting in a decrease in the reliability of the system.
In the radioactive aerosol sampling measuring instrument, since the counter generates an accumulation error when calculating the accumulation length of the filter paper, the actual amount of the filter paper/the accumulation length cannot be accurately fed back.
In the radioactive aerosol sampling measurement instrument, a preservative film which is easily broken is used as a sample packaging film, and a breakage detection means for the sample packaging film is lacking. Therefore, even if the sample encapsulating film is broken, the sampling meter is still operated as usual. As a result, it cannot be guaranteed that the sample is protected from secondary contamination.
In the radioactive aerosol sampling measuring instrument, the usable temperature range of the code printer is small, so that the code printer cannot be used in a low-temperature environment, and as a result, the application range of the sampling measuring instrument is directly influenced.
In the radioactive aerosol sampling measuring instrument, noise reduction measures are lacked, so that the noise of the sampling measuring instrument is relatively large during operation.
In the radioactive aerosol sampling and measuring instrument, the operation procedure for replacing consumables such as filter paper is complicated.
Disclosure of Invention
[ technical purpose ] to provide a method for producing a semiconductor device
The present invention has been made to solve the above technical problems, and other technical problems that will be mentioned hereinafter.
[ technical solution ] A
According to one aspect of the present invention, a fully automated radioactive aerosol sampling, measurement and analysis system is provided. The full-automatic radioactive aerosol sampling, measuring and analyzing system comprises a filter paper automatic conveying and recovering module, an aerosol sampling module, an analyzing and measuring module and a control module. The modules are designed modularly and are adapted to be transported independently of each other.
Accordingly, the modules are adapted to be assembled to form the fully automated radioactive aerosol sampling, measurement and analysis system.
Preferably, the automatic filter paper transfer and recovery module comprises: a body support and/or base plate for mounting and/or carrying components of the fully automated radioactive aerosol sampling, measurement and analysis system; a filter paper supply roller for storing and supplying unused filter paper; a coating film supply roller for storing and supplying a coating film; a coating attaching mechanism for attaching the coating to the filter paper with the sample; and a sample filter paper recovery roller for recovering filter paper on which the analytical measurement of the sample has been completed.
Preferably, the cover film is a pressure-sensitive adhesive cover film and includes a cover film main body and a base paper. The film body is used for being attached to the filter paper with the sample. Before the film main body is attached to the filter paper, the film main body and the base paper are mutually peeled. The automatic filter paper conveying and recovering module further comprises a film-coated base paper recovering roller for recovering and storing the base paper.
Preferably, a mark is provided on a surface of the coating film. The control module includes one or more mark sensors to sense marks on the surface of the cover film and generate a sensing signal.
Preferably, the indicia on the surface of the overlay is a counting cursor and/or a positioning cursor; accordingly, the mark sensor is a cursor sensor. Optionally, the indicia on the surface of the cover film is a bar code; accordingly, the indicia sensor is a bar code scanner.
Preferably, the aerosol sampling module comprises a die lifting and pressing mechanism and a sampler main body communicated with the die lifting and pressing mechanism. The filter paper moves through the die-lifting mechanism to complete the sampling operation while the aerosol flows through the die-lifting mechanism and the sampler body.
Preferably, one or more blowers are disposed within the sampler body. The housing of the sampler body is affixed with sound insulating/dampening material, such as dampening cotton.
Preferably, an air inlet pipe, a silica gel transition pipe, an air inlet box, a first air blower and a second air blower which are connected in parallel, a first exhaust pipeline communicated with the first air blower, a second exhaust pipeline communicated with the second air blower and an exhaust box are arranged in the sampler main body. The first exhaust duct and the second exhaust duct each comprise a silicone reducer and both open into the exhaust box.
Preferably, the analytical measurement module comprises a lead chamber. The lead chamber has an opening. The opening of the lead chamber is opened along a tangential/tangential direction of an inner wall surface of the cylindrical internal space of the lead chamber.
In particular, the opening is used for introducing and discharging filter paper with a sample. And a measuring analyzer mounting cylinder is arranged at the center of the cylindrical inner space of the lead chamber. And a measurement analyzer is arranged in the measurement analyzer mounting cylinder. Since the opening is opened along the tangential/tangential direction of the inner wall surface of the cylindrical internal space of the lead chamber, the opening does not face the measurement analyzer mounting tube/measurement analyzer.
Preferably, one or more guide rollers are provided around the measurement and analysis instrument mounting cylinder such that the filter paper wraps most or all of the outer circumferential surface of the measurement and analysis instrument mounting cylinder.
[ technical effects ] of
The full-automatic radioactive aerosol sampling, measuring and analyzing system can be used for detecting natural environmental nuclides, artificial nuclides, industrial nuclides and the like.
Compared with the integrated design scheme in the prior art, the full-automatic radioactive aerosol sampling, measuring and analyzing system adopts the modular design scheme, has high intelligent degree, simple and compact structure, light weight, simple and convenient operation and high reliability, and is convenient to apply to various occasions such as a field fixed station room, a vehicle-mounted movable station room and the like.
Therefore, the technical scheme of the invention solves the technical problems of complicated structure and technical scheme, low reliability, heavy equipment, large volume, high noise, poor portability, unreliable mode for protecting the sample from secondary pollution, complicated consumable replacement operation, narrow application environment range and the like in the prior art.
In addition, the full-automatic radioactive aerosol sampling, measuring and analyzing system can operate fully automatically, so that long-term unattended operation can be realized.
In addition, the full-automatic radioactive aerosol sampling, measuring and analyzing system can ensure that the paper feeding step length of the filter paper is consistent, and no accumulated error is generated.
Drawings
In order to facilitate understanding of the present invention, technical solutions of the present invention are described in more detail below based on exemplary embodiments in conjunction with the accompanying drawings. The same or similar reference numbers are used in the drawings to refer to the same or similar parts. It should be understood that the drawings are merely schematic and that the dimensions and proportions of elements in the drawings are not necessarily precise.
Fig. 1 is a perspective view of a fully automated radioactive aerosol sampling, measurement and analysis system according to an exemplary embodiment of the present invention.
Fig. 2 is a partially cut-away perspective view of a membrane lifting mechanism in the fully automated radioactive aerosol sampling measurement and analysis system shown in fig. 1, wherein a portion of a housing of an actuating portion of the membrane lifting mechanism is removed to more clearly show the internal configuration of the actuating portion.
Fig. 3 is a front view of the sampler body in the fully automatic radioactive aerosol sampling measurement analysis system of fig. 1 with the front cover of the sampler body removed to more clearly show the internal construction of the sampler body.
Fig. 4 is a perspective view of a lead chamber in the fully automatic radioactive aerosol sampling, measurement and analysis system shown in fig. 1, with a front cover plate of the lead chamber removed to more clearly show the internal construction of the lead chamber.
Detailed Description
Fig. 1 is a perspective view of a fully automated radioactive aerosol sampling, measurement and analysis system according to an exemplary embodiment of the present invention. A plurality of arrows in fig. 1 are used to indicate the moving direction of the filter paper, the coating film, and the coated base paper described later. The full-automatic radioactive aerosol sampling, measuring and analyzing system adopts a modular design scheme and mainly comprises a filter paper automatic conveying and recovering module, an aerosol sampling module, an analysis and measurement module and a control module.
Specifically, the automatic filter paper conveying and recovering module mainly comprises the following components:
a) main body support 1 and bottom plate 16
The body support 1 may be made of a light and strong aluminum alloy profile for mounting/carrying other members. The main body support 1 and/or the bottom plate 16 are provided with mounting interfaces (not shown) for mounting and fixing the whole automatic radioactive aerosol sampling, measuring and analyzing system.
b) Filter paper supply roll 2
The filter paper supply roller 2 is used for storing a clean, unused filter paper roll, and for supplying filter paper to a later-described film lifting and pressing mechanism 13.
c) Coating film supply roller 3
The coating film supply roller 3 is used for storing a roll of coating film and for supplying the coating film to a coating film attaching mechanism 6 described later. The cover film is, for example, a pressure-sensitive adhesive cover film, and includes a cover film body (herein, the cover film body is also simply referred to as "cover film" without ambiguity) and a base paper. The film coating main body can be pasted on a filter paper sample after sampling so as to protect the sample from external secondary pollution, improve the tensile strength of the filter paper and ensure that the paper is not broken in the paper feeding process. Before the main body of the coating film is attached to the filter paper, the main body of the coating film and the base paper are peeled off from each other.
Advantageously, the surface of the cover film is printed with a counting cursor, a positioning cursor, etc. These cursors can generate sensing signals in cooperation with cursor sensors 9, 10, 11 described later. These sensing signals can be used to calculate the distance of paper feed and to perform paper break, jam and full detection etc. In addition, by using the sensing signals, the step length of each paper feeding can be ensured to be consistent without generating accumulative errors.
Advantageously, the surface of the covering film is printed with a bar code. During the paper advance, a sensor may be used to read the bar code and generate a sensing signal. The corresponding bar code corresponds to the sample on the filter paper and to the analytical data of the sample to facilitate sample review.
d) Film-coated base paper recovery roller 4
The film-coated base paper recovery roller 4 is used to recover and store the film-coated base paper.
e) Sample filter paper recovery roller 5
The sample filter paper recovery roller 5 is used to recover sample filter paper from a lead chamber 7 described later, which has completed analytical measurement of a sample.
f) Laminating mechanism 6
The film laminating mechanism 6 is used for laminating the filter paper and the film.
g) A plurality of guide rollers 14
The guide rollers 14 are used to guide the running direction of the filter paper and the coating film.
h) Bar code scanner 15
The barcode scanner 15 is used to scan/read a barcode on the surface of the cover film.
The control module mainly comprises an aerosol controller, a roller controller 12 and cursor sensors 9, 10 and 11. In the present exemplary embodiment, cursor sensors 9 and 10 are provided side by side in the vicinity above the cover lay attaching mechanism 6 to sense a cursor on the cover lay and send a sensing signal to a central processor (not shown). Further, a cursor sensor 11 is provided near the outer periphery of the film-coated base paper recovery roller 4 to sense the recovery of the film-coated base paper and send a sensing signal to the cpu. These sensing signals can be used to calculate the paper advance distance and detect conditions such as paper breaks, paper jams or full paper from the paper advance distance.
It should be understood that the types, positions, orientations, numbers, arrangements, detected objects, and the like of the cursor sensors 9, 10, and 11 described above are merely illustrative, and not restrictive. Those skilled in the art can appropriately change the type, position, orientation, number, arrangement, detected object, etc. of the cursor sensor according to actual needs when implementing the present invention.
In addition, the roller controller 12 is used to control the operation of a drive motor (not shown) for each of the above-described rollers. The roll controller 12 may include a distance measuring unit to detect such conditions as paper out, paper break, and paper full.
The aerosol sampling module mainly comprises a die lifting and pressing mechanism 13 and a sampler main body 8.
Fig. 2 is a partially cut-away perspective view of the film lifting and pressing mechanism 13, in which a part of a housing 1307 of an actuating portion of the film lifting and pressing mechanism 13 is removed in order to more clearly show the internal configuration of the actuating portion.
Specifically, the film lifting and pressing mechanism 13 mainly includes the air guide cover 1301 and the above-described actuator.
The scoop 1301 generally includes an upper half and a lower half. The upper and lower halves of the scoop 1301 can cooperate with each other, thereby forming an enclosed space, i.e. a sampling chamber. An upper opening of an upper half of the air guide 1301 communicates with an air intake duct (see fig. 1), and a lower opening of a lower half of the air guide 1301 communicates with an aerosol sampling module described later. An upper template 1302 is provided at a lower edge of an upper half of the air guide 1301, and a lower template 1311 is provided at an upper edge of a lower half of the air guide 1301. The actuator portion generally includes a cross brace 1303, a power push bar 1304, a support 1305, a guide 1306, a housing 1307, and a mount 1308.
The upper half of the scoop 1301 (specifically the upper die plate 1302) is coupled to the power ram 1304 and moves along the guide track 1306 as driven by the power ram 1304. The lower half of the scoop 1301 is fixedly connected to a mounting 1308. Thus, the upper die plate 1302 can be selectively attached to or detached from the lower die plate 1311 by the actuation of the power ram 1304.
A gap is formed between the upper and lower templates 1302 and 1311 through which filter paper may pass. More specifically, when the electric push rod 1304 pushes the upper template 1302 to move upward along the guide rail 1306, the filter paper is released. When the electric push rod 1304 pulls the upper template 1302 to move downward along the guide rail 1306, the upper template 1302 is pressed against the lower template 1311, thereby pressing the filter paper.
In addition, a sealing ring 1313 is provided at the edges of the upper and lower templates 1302, 1311 to ensure the air tightness of the sampling chamber, so that the air flow is filtered by the filter paper to make the sample to be obtained stay on the filter paper. In the present exemplary embodiment, the air flow flows from the upper half of the air guide cover 1301 to the lower half of the air guide cover 1301, and therefore, a screen 1312 is preferably disposed between the upper half of the air guide cover 1301 and the filter paper. In addition, it is preferable that a stroke switch 1309 is provided on the lower template 1311, and a stopper 1310 is provided on the upper template 1302. In this way, the movement of the upper die plate 1302 relative to the lower die plate 1311 can be more accurately controlled.
Fig. 3 is a front view of the sampler body 8 with the front cover plate of the sampler body 8 removed to more clearly show the internal construction of the sampler body 8.
Specifically, the sampler body 8 mainly includes a case 812 and a blower system. Sound insulating/dampening material (e.g., dampening cotton) is attached to the interior walls of the housing 812 to reduce noise during operation of the blower system. The blower system takes the form of a dual blower parallel and includes a first blower and a second blower 807. The airflow from the aerosol sampling module enters the air inlet box 810 through the air inlet pipe 801 and the silica gel transition pipe 811, then passes through the first air blower and the second air blower 807 respectively, and is merged into the air outlet box 804 through the short silica gel reducer pipe 802 and the long silica gel reducer pipe 805 respectively, and finally is discharged to the surrounding environment. More specifically, the first and second blowers 807 are connected to the short silica gel reducer pipe 802 and the long silica gel reducer pipe 805 through the second clips 806, respectively, and the short silica gel reducer pipe 802 and the long silica gel reducer pipe 805 are connected to the exhaust box 804 through the first clips 803, respectively. The layout mode in the exemplary embodiment is beneficial to reducing the air duct resistance, improving the double-machine parallel connection efficiency and facilitating maintenance.
The filter paper with the sample enters the coating film attaching mechanism 6 after passing through the air guide cover 1301, and is laminated with the coating film supplied from the coating film supply roller 3 here, and then enters an analytical measurement module described later.
The analytical measuring module mainly comprises a lead chamber 7 and a measuring analyzer arranged in the lead chamber 7. The measurement analyzer is used for measuring and analyzing a sample on the filter paper.
Fig. 4 is a perspective view of the lead chamber 7, in which the front cover plate of the lead chamber 7 is removed in order to show the internal construction of the lead chamber 7 more clearly. The lead chamber 7 is generally cylindrical, and mainly includes a lead chamber opening 705, a measurement analyzer installation cylinder 703, and a plurality of guide rollers 701 and 702. As shown in fig. 4, the opening 705 of the lead chamber is opened along the tangent/tangent plane direction of the inner wall surface 706 of the lead chamber 7, and the measurement analyzer mounting cylinder 703 is located at the center of the lead chamber 7, that is, the opening 705 of the lead chamber does not face the measurement analyzer mounting cylinder 703, but staggers from the measurement analyzer mounting cylinder 703, so that external rays can be prevented from directly irradiating the measurement analyzer (not shown) mounted in the measurement analyzer mounting cylinder 703 through the opening 705 of the lead chamber, the influence of the external rays on the measurement analyzer can be avoided, and the accuracy of the detection result can be improved.
In addition, the plurality of guide rollers specifically include: one or more first guide rollers 701 provided on a radially outer inlet/outlet side of the lead chamber opening 705 (an upper side of the lead chamber opening 705 in fig. 4) for guiding the filter paper entering the lead chamber 7 in a direction a as shown in fig. 4; a plurality of second guide rollers 702 provided between a radially inner inlet-outlet side of the lead chamber opening 705 (a lower side of the lead chamber opening 705 in fig. 4) and the measurement analyzer installation cylinder 703 and arranged such that the filter paper is wrapped on as large an area as possible of an outer peripheral surface of the measurement analyzer installation cylinder 703 to make an area of the filter paper detectable by the measurement analyzer in one detection operation as large as possible and to make a total time for which a sample on the filter paper is detected by the measurement analyzer as long as possible to improve accuracy of a detection result. For example, in the exemplary embodiment shown in fig. 4, the filter paper is guided along an inner common tangent plane of measurement analyzer mounting cylinder 703 and second guide roller 702 disposed immediately adjacent to measurement analyzer mounting cylinder 703.
In addition, the plurality of guide rollers may further specifically include one or more third guide rollers for moving the sample filter paper 704 discharged from the lead chamber opening 705 in the direction B as shown in fig. 4. The measurement analyzer is, for example, a lanthanum bromide spectrometer.
The technical objects, technical solutions and technical effects of the present invention have been described in detail above with reference to specific embodiments. It should be understood that the above-described embodiments are exemplary only, and not limiting. Any modification, equivalent replacement, improvement and the like made by those skilled in the art within the spirit and principle of the present invention are included in the protection scope of the present invention.
[ List of reference numerals ]
1 main body support 2 filter paper supply roll
3 coating film supply roller 4 coating film base paper recovery roller
5 6 tectorial membrane laminating mechanisms of sample filter paper recovery roller
7 lead chamber 8 sampler main body
9 Cursor sensor 10 Cursor sensor
12 roller controller of 11 cursor sensor
13 lift 14 guide rolls of die pressing mechanism
15 bar code scanner 16 backplane
701 first guide roller 702 second guide roller
704 sample filter paper for 703 measurement analyzer installation cylinder
705 lead chamber opening 706 lead chamber inner wall surface
801 air inlet pipe 802 short silica gel reducing pipe
803 first clip 804 air-bleeding box
Second clip of 805-length silica gel reducer 806
807 air blower 808 seal gasket
809 air inlet box 810 third clip
811 silica gel transition pipe 812 box
1301 air guide cover 1302 upper template
1303 ribbed plate 1304 electric push rod
1305 support seat 1306 guide rail
1307 housing 1308 mounting seat
1309 travel switch 1310 limit block
1311 lower template 1312 screen
1313 sealing ring.
Claims (8)
1. A fully automated radioactive aerosol sampling, measurement and analysis system comprising a filter paper auto-transport recovery module, an aerosol sampling module, an analytical measurement module and a control module, each module being modularly designed and adapted to be transported independently of each other, the filter paper auto-transport recovery module comprising:
a body support (1) and/or a base plate (16) for mounting and/or carrying components of the fully automated radioactive aerosol sampling, measurement and analysis system;
a filter paper supply roller (2) for storing and supplying unused filter paper;
a coating film supply roller (3) for storing and supplying a coating film;
a coating attaching mechanism (6) for attaching the coating to the filter paper with the sample; and
a sample filter paper recovery roller (5) for recovering filter paper for which the analytical measurement of the sample has been completed,
the film is a non-setting adhesive film and comprises a film main body and a piece of bottom paper, wherein the film main body is used for being attached to the filter paper with the sample; before the film coating main body is attached to the filter paper, the film coating main body and the base paper are mutually peeled; and the automatic filter paper conveying and recovering module also comprises a film-coated base paper recovering roller (4) for recovering and storing the base paper.
2. A fully automated radioactive aerosol sampling, measurement and analysis system according to claim 1, wherein a surface of the covering membrane is provided with a marker; and the control module comprises one or more mark sensors (9, 10, 11) for sensing marks on the surface of the cover film and generating a sensing signal.
3. A fully automated radioactive aerosol sampling, measurement and analysis system according to claim 2, wherein the marker on the surface of the cover film is a counting cursor and/or a positioning cursor and the marker sensor is a cursor sensor.
4. A fully automated radioactive aerosol sampling, measurement and analysis system according to claim 2, wherein the marking on the surface of the cover film is a bar code and the marking sensor is a bar code scanner (15).
5. A fully automated radioactive aerosol sampling, measurement and analysis system according to claim 1, wherein the aerosol sampling module comprises a pressure-die-lifting mechanism (13) and a sampler body (8) in communication with the pressure-die-lifting mechanism; while aerosol flows through the die-lifting mechanism and the sampler body, the filter paper moves through the die-lifting mechanism to complete a sampling operation, the die-lifting mechanism comprising:
the air guide hood (1301) comprises an upper half portion and a lower half portion, the upper half portion and the lower half portion are matched with each other to form a sampling chamber, an upper template (1302) is arranged at the lower edge of the upper half portion, a lower template (1311) is arranged at the upper edge of the lower half portion, and a gap is formed between the upper template and the lower template so that filter paper can pass through the gap; and
an actuating portion including an electric push rod (1304), a support base (1305), a guide rail (1306), and a mounting base (1308),
the upper template is connected with the electric push rod and moves along the guide rail under the driving of the electric push rod, and the lower half part of the air guide cover is fixedly connected with the mounting seat, so that the upper template can be selectively attached to or separated from the lower template under the driving of the electric push rod.
6. The full-automatic radioactive aerosol sampling, measuring and analyzing system according to claim 5, wherein the sampler main body comprises a box body, sound insulation/silencing material is adhered on the inner wall of the box body, an air inlet pipe (801), a silica gel transition pipe (811), an air inlet box (809), an air blower system and an exhaust box (804) are arranged in the box body,
wherein the blower system comprises a first blower and a second blower (807) in the form of a dual-machine parallel connection, the first blower and the second blower are respectively connected to a short silica gel reducer pipe (802) and a long silica gel reducer pipe (805), the short silica gel reducer pipe and the long silica gel reducer pipe are respectively connected to the exhaust box, and
wherein, come from aerosol sampling module's air current via the intake pipe silica gel transition pipe gets into in the box of admitting air, then pass through respectively first air-blower with the second air-blower and respectively via short silica gel reducing pipe with long silica gel reducing pipe joins in the exhaust box, finally discharge to the surrounding environment in.
7. A fully automatic radioactive aerosol sampling, measurement and analysis system according to claim 1, wherein the analytical measurement module comprises a lead chamber (7) having an opening (705) opening in a tangential direction of an inner wall surface of a cylindrical interior space of the lead chamber.
8. A fully automated radioactive aerosol sampling, measurement and analysis system according to claim 7, wherein a measurement and analysis meter mounting canister is provided at the center of the cylindrical interior space of the lead chamber, and one or more guide rollers (702) are provided around the measurement and analysis meter mounting canister such that the filter paper (704) wraps most or all of the outer peripheral surface of the measurement and analysis meter mounting canister.
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| CN201810075462.8A CN110082166B (en) | 2018-01-25 | 2018-01-25 | Full-automatic radioactive aerosol sampling, measuring and analyzing system |
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