CN110514512B - Spherical bursting strength tester - Google Patents
Spherical bursting strength tester Download PDFInfo
- Publication number
- CN110514512B CN110514512B CN201910679463.8A CN201910679463A CN110514512B CN 110514512 B CN110514512 B CN 110514512B CN 201910679463 A CN201910679463 A CN 201910679463A CN 110514512 B CN110514512 B CN 110514512B
- Authority
- CN
- China
- Prior art keywords
- water
- ball head
- transmission shaft
- measuring rod
- bursting strength
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000009172 bursting Effects 0.000 title claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 64
- 239000007788 liquid Substances 0.000 claims abstract description 14
- 238000005086 pumping Methods 0.000 claims description 20
- 230000005540 biological transmission Effects 0.000 claims description 15
- 238000013016 damping Methods 0.000 claims description 14
- 230000037452 priming Effects 0.000 claims description 9
- 230000033001 locomotion Effects 0.000 claims description 4
- 230000006835 compression Effects 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 238000001514 detection method Methods 0.000 abstract description 2
- 239000000123 paper Substances 0.000 description 23
- 238000004891 communication Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000011087 paperboard Substances 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C13/00—Means for manipulating or holding work, e.g. for separate articles
- B05C13/02—Means for manipulating or holding work, e.g. for separate articles for particular articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
- B05C5/02—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/04—Chucks
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/022—Environment of the test
- G01N2203/0236—Other environments
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/026—Specifications of the specimen
- G01N2203/0262—Shape of the specimen
- G01N2203/0278—Thin specimens
- G01N2203/0282—Two dimensional, e.g. tapes, webs, sheets, strips, disks or membranes
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention relates to a spherical bursting strength tester. The invention aims to provide the spherical bursting strength tester which has the advantages of simple structure, convenient operation and high accuracy, so that the conventional bursting strength test can be carried out, and the bursting strength test can be carried out on the paper sample after being soaked in water and wetted. The technical scheme of the invention is as follows: a spherical bursting strength tester is characterized in that: the automatic metering and liquid filling device is characterized by comprising a paper clamping mechanism, wherein a ball head measuring rod is arranged corresponding to the paper clamping mechanism, the upper end of the ball head measuring rod is connected with a ball head lifting mechanism through a pressure sensor, a water diversion sleeve is sleeved on the ball head measuring rod, and the water diversion sleeve is communicated with a metering and liquid filling device through a hose connector and a hose. The invention is suitable for the field of paper toilet paper and product detection thereof.
Description
Technical Field
The invention relates to a dry (wet) dual-purpose spherical bursting strength tester. Is suitable for the field of paper toilet paper and product detection thereof.
Background
The ball burst refers to the maximum compressive strength that the surface of the toilet paper or paper board and its products can withstand per unit area in a uniformly increasing direction perpendicular to the surface of the test specimen. At present, various types of bursting strength measuring instruments exist on the market, however, any wet bulb bursting strength measuring instrument after paper soaking does not exist.
Disclosure of Invention
The invention aims to solve the technical problems that: aiming at the problems, the spherical bursting strength tester with simple structure, convenient operation and high accuracy is provided, so that the conventional bursting strength test can be carried out, and the bursting strength test can be carried out on the paper sample after the paper sample is soaked and wetted.
The technical scheme adopted by the invention is as follows: a spherical bursting strength tester is characterized in that: the automatic metering and liquid filling device is characterized by comprising a paper clamping mechanism, wherein a ball head measuring rod is arranged corresponding to the paper clamping mechanism, the upper end of the ball head measuring rod is connected with a ball head lifting mechanism through a pressure sensor, a water diversion sleeve is sleeved on the ball head measuring rod, and the water diversion sleeve is communicated with a metering and liquid filling device through a hose connector and a hose.
The metering and priming device is provided with a liquid storage cavity and a water pumping pipe;
a piston rod matched with the water pumping pipe is arranged in the water pumping pipe, a thread is arranged on an exposed section of the piston rod exposed out of the water pumping pipe and is in threaded connection with a metering adjusting nut, and a reset spring connected with the end part of the piston rod is arranged in a rodless cavity of the water pumping pipe;
the liquid storage cavity is communicated with the rodless cavity of the water pumping pipe through the one-way valve I, and the rodless cavity of the water pumping pipe is communicated with the water outlet joint through the one-way valve II.
The paper clamping mechanism is provided with an upper pressing ring and a lower pressing ring, the lower pressing ring is connected with a pressing ring lifting mechanism, and the lower end of the lower pressing ring is connected with a water bearing disc.
The compression ring lifting mechanism is provided with a transmission shaft II connected to the lower end of the water-bearing disc, the lower end of the transmission shaft II is connected with a spring connecting seat through a spring, and a rocker arm assembly is arranged below the spring connecting seat.
The ball head lifting mechanism is provided with a motor and a screw rod which converts the rotation of the motor into linear motion, the screw rod is coaxially connected with a transmission shaft I, and the rotation shaft I is connected with the pressure sensor through a movable support plate.
The screw rod is connected with the rotating shaft I through a damping connecting shaft device.
The damping connecting shaft device is provided with an input connecting disc, an output flange II 507, a gasket and a bolt, wherein an elastic pad I is arranged between the gasket and the input connecting disc, an elastic pad II is arranged between the input connecting disc and the output flange II 507, the gasket is fixed on the output flange II 507 through bolts sequentially penetrating through the gasket, the elastic pad I, the input connecting disc and the elastic pad II, damping holes are formed in the input connecting disc corresponding to the bolts, and elastic rings sleeved on the bolts are arranged in the damping holes;
the input connecting disc is coaxially connected with the screw rod, and the output flange II 507 is coaxially connected with the transmission shaft I.
The diameter of the water outlet at the lower end of the water diversion sleeve is slightly larger than the diameter of the ball head measuring rod.
The beneficial effects of the invention are as follows: according to the invention, the water diversion sleeve is sleeved on the ball head measuring rod and is communicated with the metering and liquid injecting device, so that water can be quantitatively added to paper on the paper clamping mechanism, and the bursting strength test can be carried out on the paper sample after the paper sample is soaked in water and moistened.
According to the invention, the water diversion sleeve for water outlet is sleeved on the ball head measuring rod, the diameter of the water outlet of the water diversion sleeve is slightly larger than that of the ball head measuring rod, so that a certain sample of paper below the ball head measuring rod is soaked by water, the water quantity of water flowing down along the ball head measuring rod from the water outlet of the water diversion sleeve is not excessive, and the paper is prevented from being damaged.
According to the metering and priming device, pumping and drainage are realized through the pumping pipe matched with the piston rod, and the metering adjusting nut is connected onto the piston rod in a threaded manner so as to limit the stroke of the piston rod, so that quantitative drainage is realized.
The ball head lifting mechanism is provided with the damping connecting shaft device, and the shock influence of the rotation of the motor on the pressure sensor and the ball head measuring rod is reduced through the damping connecting shaft device, so that the accuracy of the test is improved.
Drawings
Fig. 1 is a front view of an embodiment.
Fig. 2 is a schematic structural diagram of an embodiment.
Fig. 3 is a schematic structural view of the metering and priming device of the embodiment.
Fig. 4 is a schematic structural view of a shock absorbing coupling device according to an embodiment.
Detailed Description
As shown in fig. 1 and 2, the present embodiment is a ball burst tester, which has a box 9, a top plate 901 of the box 9 is connected with a fixing plate 7 via a sleeve 6, a paper clamping mechanism 1 is arranged below the fixing plate 7, a ball measuring rod 106 is arranged corresponding to the paper clamping mechanism 1, and the upper end of the ball measuring rod is connected with a ball lifting mechanism via a pressure sensor 8.
In the embodiment, a water diversion sleeve 107 is sleeved on the ball head measuring rod 106, the upper end of the water diversion sleeve 107 is connected with the fixing plate 7, and the diameter of a water outlet at the lower end of the water diversion sleeve 107 is slightly larger than that of the ball head measuring rod 106. The outer wall of the water diversion sleeve 107 is connected with a hose joint 108 communicated with the inside of the water diversion sleeve, the hose joint 108 is communicated with the metering and priming device 3 through a hose, and the metering and priming device 3 is connected with the fixed plate 7.
As shown in fig. 3, the liquid metering and filling device 3 in this example is provided with a cup base 301, a cup body 302 and a cup cover 303, wherein a base through hole is formed in the center of the cup base 301, and a one-way valve i 3011 for communicating the upper end face and the lower end face of the cup base 301 is arranged in the cup base; the center of the cup cover 303 is provided with a cover body through hole, and the cup cover 303 is provided with a liquid filling opening and is provided with a liquid filling opening plug 3015. The cup cover 303 and the cup base 301 are respectively connected to the upper end and the lower end of the cup body 302 to form a liquid storage chamber 304.
In this example, a water pumping pipe 305 is disposed in the liquid storage chamber 304, the lower end of the water pumping pipe is communicated with a base through hole on the cup base 301, and the upper end of the water pumping pipe 305 passes through a cover through hole on the cup cover 303 and then is exposed at the upper end of the cup cover 303. The pumping pipe 305 is internally provided with a piston rod 306, the upper end of the piston rod 306 is exposed out of the upper end of the pumping pipe 305, and a metering adjusting nut 308 is screwed on the exposed section of the piston rod 306, so that the downward movement stroke of the piston rod 306 is limited by the metering adjusting nut 308.
In this embodiment, the lower end of the cup base 301 is connected to an output flange i 309, an output through hole is formed in the output flange i 309 corresponding to the base through hole in the cup base 301, and a communication groove 3014 communicating with the output through hole is formed in the upper end surface of the output flange i 309. The reservoir chamber 304 communicates through a one-way valve I3011 on the cup base 301 to a communication slot 3014 on the underlying output flange I309. The lower end of the piston rod 306 in this example is supported on the output flange I309 via a return spring 307 to power the upward return of the piston rod 306 after the piston rod 306 is forced downward.
In this example, a water outlet connector 3013 of a connection hose is connected to the lower end of the output flange i 309, and the water outlet connector 3013 is correspondingly communicated with an output through hole of the output flange i 309. The water outlet connector 3013 is internally provided with a one-way valve II 3012, and the output through hole is communicated with the water outlet connector 3013 through the one-way valve II 3012.
In this embodiment, the paper clamping mechanism 1 has an upper pressing ring 101 and a lower pressing ring 102, wherein the upper end of the upper pressing ring 101 is connected with the fixing plate 7, the lower end of the lower pressing ring 102 is connected with a water bearing disc 103, and the lower pressing ring is connected with the pressing ring lifting mechanism 4 through the water bearing disc 103.
The medium-pressure ring lifting mechanism 4 in the embodiment is provided with a rocker arm assembly 401 arranged in the box body 9, a spring 403 connecting seat 402 is arranged above the rocker arm assembly 401, a transmission shaft II 404 is connected to the spring 403 connecting seat 402 through the spring 403, and the upper end of the transmission shaft II 404 penetrates through a top plate 901 of the box body 9 and then is connected with a water bearing disc 103 below the lower pressure ring 102.
In this embodiment, the ball head lifting mechanism is provided with a motor 201 installed in the box 9 and a screw rod 202 for converting the rotation of the motor 201 into linear motion, and the upper end of the screw rod 202 is coaxially connected with a transmission shaft I203 through a damping connecting shaft device 5. After passing through the sleeve 6 and the fixed plate 7, the transmission shaft I203 is connected with the movable support plate 14 at the upper end, and the ball measuring rod 106 is arranged on the movable support plate 14 through the pressure sensor 8.
As shown in fig. 4, the damping coupling device 5 in this example has an input connection pad 501, an output flange ii 507, a gasket 502 and a bolt 504, the output flange ii 507, the input connection pad 501 and the gasket 502 are distributed vertically, an elastic pad i 503 is disposed between the gasket 502 and the input connection pad 501, an elastic pad ii 505 is disposed between the input connection pad 501 and the output flange ii 507, and the gasket 502 is fixed to the output flange ii 507 by the bolt 504 passing through the gasket 502, the elastic pad i 503, the input connection pad 501 and the elastic pad ii 505 in order. The input connecting disc 501 is coaxially connected with the screw rod 202, and the output flange II 507 is coaxially connected with the transmission shaft I203.
In this embodiment, a damping hole is formed on the input connection disc 501 corresponding to the bolt 504, and an elastic ring 506 sleeved on the bolt 504 is disposed in the damping hole.
The working principle of this embodiment is as follows: the paper sample to be detected is clamped by the paper sample clamping mechanism 1, a piston rod 306 on the metering and priming device 3 is arranged until a metering and adjusting nut 308 on the piston rod 306 impacts the upper end of the water pumping pipe 305, the metering and priming device 3 conveys quantitative water to the water diversion sleeve 107 through a hose, water in the water diversion sleeve 107 flows down along the ball head measuring rod 106 and drops on the paper sample to be detected below the ball head measuring rod 106, so that the paper immersed sample is wet, and then the ball head lifting device is controlled to descend the ball head measuring rod 106 so as to perform bursting strength test on the paper sample.
It should be understood that the above description is not intended to limit the invention to the particular embodiments disclosed, but to limit the invention to the particular embodiments disclosed, and that various changes, additions and substitutions can be made by those skilled in the art without departing from the scope of the invention.
Claims (3)
1. A spherical bursting strength tester is characterized in that: the device is provided with a paper sample clamping mechanism (1), a ball head measuring rod (106) is arranged corresponding to the paper sample clamping mechanism (1), the upper end of the ball head measuring rod is connected with a ball head lifting mechanism through a pressure sensor (8), a water diversion sleeve (107) is sleeved on the ball head measuring rod (106), and the water diversion sleeve (107) is communicated with a metering and priming device (3) through a hose joint (108) and a hose (10);
the metering and priming device (3) is provided with a liquid storage cavity (304) and a water pumping pipe (305);
a piston rod (306) which is matched with the water pumping pipe (305) is arranged in the water pumping pipe (305), threads are formed on the exposed section of the piston rod (306) which is exposed out of the water pumping pipe (305) and are in threaded connection with a metering adjusting nut (308), and a reset spring (307) which is connected with the end part of the piston rod (306) is arranged in a rodless cavity of the water pumping pipe (305);
the liquid storage cavity (304) is communicated with a rodless cavity of the water suction pipe (305) through a one-way valve I (3011), and the rodless cavity of the water suction pipe (305) is communicated with the water outlet joint (3013) through a one-way valve II (3012);
the screw rod (202) is connected with a transmission shaft I (203) through a damping connecting shaft device (5);
the ball head lifting mechanism is provided with a motor (201) and a screw rod (202) for converting the rotation of the motor (201) into linear motion, the screw rod (202) is coaxially connected with a transmission shaft I (203), and the transmission shaft I (203) is connected with the pressure sensor (8) through a movable support plate (14);
the damping connecting shaft device (5) is provided with an input connecting disc (501), an output flange II (507), a gasket (502) and a bolt (504), wherein an elastic pad I (503) is arranged between the gasket (502) and the input connecting disc (501), an elastic pad II (505) is arranged between the input connecting disc (501) and the output flange II (507), the gasket (502) is fixed on the output flange II (507) through bolts (504) penetrating through the gasket (502), the elastic pad I (503), the input connecting disc (501) and the elastic pad II (505) in sequence, damping holes are formed in the input connecting disc (501) corresponding to the bolts (504), and elastic rings (506) sleeved on the bolts (504) are arranged in the damping holes;
the input connecting disc (501) is coaxially connected with the screw rod (202), and the output flange II (507) is coaxially connected with the transmission shaft I (203);
the diameter of the water outlet at the lower end of the water diversion sleeve (107) is slightly larger than the diameter of the ball head measuring rod (106).
2. The ball burst meter of claim 1, wherein: the paper sample clamping mechanism (1) is provided with an upper pressing ring (101) and a lower pressing ring (102), the lower pressing ring (102) is connected with a pressing ring lifting mechanism, and the lower end of the lower pressing ring is connected with a water bearing disc (103).
3. The ball burst meter of claim 2, wherein: the compression ring lifting mechanism is provided with a transmission shaft II (404) connected to the lower end of the water-bearing disc (103), the lower end of the transmission shaft II (404) is connected with a spring connecting seat (402) through a spring (403), and a rocker arm assembly (401) is arranged below the spring connecting seat (402).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910679463.8A CN110514512B (en) | 2019-07-26 | 2019-07-26 | Spherical bursting strength tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910679463.8A CN110514512B (en) | 2019-07-26 | 2019-07-26 | Spherical bursting strength tester |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110514512A CN110514512A (en) | 2019-11-29 |
| CN110514512B true CN110514512B (en) | 2024-03-08 |
Family
ID=68624074
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910679463.8A Active CN110514512B (en) | 2019-07-26 | 2019-07-26 | Spherical bursting strength tester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110514512B (en) |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU374538A1 (en) * | 1971-07-06 | 1973-03-20 | Пермский филиал Всесоюзного научно исследовательского института целлюлозно бумажной промышленности | |
| CA1060674A (en) * | 1976-05-11 | 1979-08-21 | Macmillan Bloedel Limited | Method and apparatus for determining the wet strength of paper |
| JPH0727769A (en) * | 1993-07-12 | 1995-01-31 | Mitsui Petrochem Ind Ltd | Automatic analyzer |
| CN1546983A (en) * | 2003-12-17 | 2004-11-17 | 东华大学 | Novel device and method for detecting wetness conducting performance of fabric |
| CN101985967A (en) * | 2010-10-29 | 2011-03-16 | 中国电力科学研究院 | Damping device for electrical equipment |
| CN204664349U (en) * | 2015-04-29 | 2015-09-23 | 重庆能特机械制造有限公司 | A kind of damper gear |
| CN205719773U (en) * | 2016-07-04 | 2016-11-23 | 四川长江造纸仪器有限责任公司 | A kind of toilet paper spherical cady test device |
| CN106525665A (en) * | 2016-12-07 | 2017-03-22 | 常州纺织服装职业技术学院 | Fabric moisture-transmitting performance testing instrument and testing method based on image processing technology |
| CN107121361A (en) * | 2017-04-24 | 2017-09-01 | 江苏工程职业技术学院 | A kind of textile drips diffusion time test equipment |
| CN107763172A (en) * | 2017-09-29 | 2018-03-06 | 泰州市润辉机械制造有限公司 | A kind of double bond groove damper gear |
| CN207435006U (en) * | 2017-11-06 | 2018-06-01 | 圣保路石油化工（天津）股份有限公司 | A kind of OIL IN LUBRICATING OIL PRODUCTION filling apparatus |
| CN211553529U (en) * | 2019-07-26 | 2020-09-22 | 中建材轻工业自动化研究所有限公司 | Spherical bursting strength tester |
-
2019
- 2019-07-26 CN CN201910679463.8A patent/CN110514512B/en active Active
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| SU374538A1 (en) * | 1971-07-06 | 1973-03-20 | Пермский филиал Всесоюзного научно исследовательского института целлюлозно бумажной промышленности | |
| CA1060674A (en) * | 1976-05-11 | 1979-08-21 | Macmillan Bloedel Limited | Method and apparatus for determining the wet strength of paper |
| JPH0727769A (en) * | 1993-07-12 | 1995-01-31 | Mitsui Petrochem Ind Ltd | Automatic analyzer |
| CN1546983A (en) * | 2003-12-17 | 2004-11-17 | 东华大学 | Novel device and method for detecting wetness conducting performance of fabric |
| CN101985967A (en) * | 2010-10-29 | 2011-03-16 | 中国电力科学研究院 | Damping device for electrical equipment |
| CN204664349U (en) * | 2015-04-29 | 2015-09-23 | 重庆能特机械制造有限公司 | A kind of damper gear |
| CN205719773U (en) * | 2016-07-04 | 2016-11-23 | 四川长江造纸仪器有限责任公司 | A kind of toilet paper spherical cady test device |
| CN106525665A (en) * | 2016-12-07 | 2017-03-22 | 常州纺织服装职业技术学院 | Fabric moisture-transmitting performance testing instrument and testing method based on image processing technology |
| CN107121361A (en) * | 2017-04-24 | 2017-09-01 | 江苏工程职业技术学院 | A kind of textile drips diffusion time test equipment |
| CN107763172A (en) * | 2017-09-29 | 2018-03-06 | 泰州市润辉机械制造有限公司 | A kind of double bond groove damper gear |
| CN207435006U (en) * | 2017-11-06 | 2018-06-01 | 圣保路石油化工（天津）股份有限公司 | A kind of OIL IN LUBRICATING OIL PRODUCTION filling apparatus |
| CN211553529U (en) * | 2019-07-26 | 2020-09-22 | 中建材轻工业自动化研究所有限公司 | Spherical bursting strength tester |
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| Publication number | Publication date |
|---|---|
| CN110514512A (en) | 2019-11-29 |
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