CN110269290A - Mask - Google Patents

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Publication number
CN110269290A
CN110269290A CN201810214590.6A CN201810214590A CN110269290A CN 110269290 A CN110269290 A CN 110269290A CN 201810214590 A CN201810214590 A CN 201810214590A CN 110269290 A CN110269290 A CN 110269290A
Authority
CN
China
Prior art keywords
mask
heat exchanger
exchanger channels
oral cavity
closure member
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.)
Pending
Application number
CN201810214590.6A
Other languages
Chinese (zh)
Inventor
石洋
王含
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
State Power Investment Group Science and Technology Research Institute Co Ltd
Original Assignee
State Power Investment Group Science and Technology Research Institute Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by State Power Investment Group Science and Technology Research Institute Co Ltd filed Critical State Power Investment Group Science and Technology Research Institute Co Ltd
Priority to CN201810214590.6A priority Critical patent/CN110269290A/en
Publication of CN110269290A publication Critical patent/CN110269290A/en
Pending legal-status Critical Current

Links

Classifications

    • AHUMAN NECESSITIES
    • A41WEARING APPAREL
    • A41DOUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D13/00Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches
    • A41D13/05Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches protecting only a particular body part
    • A41D13/11Protective face masks, e.g. for surgical use, or for use in foul atmospheres

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)

Abstract

The invention discloses a kind of masks, the inside of mask is formed with heat exchanger channels, one end of heat exchanger channels extends to the position opposite with nasal cavity and/or oral cavity on the inside of mask, and the other end of heat exchanger channels extends to the exterior space of connection mask, and heat exchanger channels are made of the multilayer chamber being formed in mask.Mask according to an embodiment of the present invention not will form glasses atomizating phenomenon so that the hot and humid gas majority of exhalation enters after the delay cooling of outer layer chamber from the direction discharge not towards glasses using the double-deck chamber Seal Design.

Description

Mask
Technical field
The present invention relates to environment-friendly products technical field, in particular to a kind of mask.
Background technique
Mask be haze during, daily life and industrial common protective articles.But it has the following disadvantages: wearing Be inconvenient to converse when mask and (be afraid of to influence to speak when quality need to frequently take mask, wear mask when such as traffic police is spoken to take Phone effect is poor need to frequently to pluck de- mask);It converses when the large spaces such as industrial production, administrative law enforcement and noisy place wearing mask Effect is poor, easily communication problem occurs so that jeopardizing production safety;Mask seals poor and exhalation gas and easily leads to glasses mist Change and does not see;It is unclear when user needs to change mask, it is difficult to maximize mask service life and performance etc. and ask Topic.
Summary of the invention
The present invention is directed to solve at least some of the technical problems in related technologies.For this purpose, of the invention One purpose is to propose that a kind of mask, the mask have the function of that glasses is prevented to be atomized.
Mask according to an embodiment of the present invention, the inside of the mask are formed with heat exchanger channels, and the one of the heat exchanger channels End extends to the position opposite with nasal cavity and/or oral cavity on the inside of the mask, and the other end of the heat exchanger channels extends to company Lead to the exterior space of the mask, the heat exchanger channels are made of the multilayer chamber being formed in the mask.
The gas of mask according to an embodiment of the present invention, user's exhalation can be changed by heat exchanger channels and outside air Heat undergoes the gas of heat transfer process that can gradually cool down, and gas after cooling is discharged by specific outlet, has just reached do not allow in this way Glasses generate the effect of atomization.
In one embodiment of the invention, the multilayer chamber along from the inside of the mask to outside direction successively Nested arrangement is sequentially arranged along the curve of detour.
In one embodiment of the invention, the outgassing direction of the other end of the heat exchanger channels and the mask with The opposite direction of eyes is staggered.
In one embodiment of the invention, the other end of the heat exchanger channels is equipped with breather valve.
In one embodiment of the invention, region opposite with oral cavity on the mask is provided with recording device or is used for Connect the interface of recording device;And/or the region opposite with oral cavity is provided with public address set or expands for connecting on the mask The interface of mixer.
In one embodiment of the invention, the mask includes: mask main body, closure member.In the mask main body with The opposite position in oral cavity is provided with opening, and the closure member is openable or closes the opening.
In one embodiment of the invention, the closure member includes one layer of filtration members or the closure member includes stacking Arrangement or multiple filtration part spaced apart from each other.
In one embodiment of the invention, the closure member be threadedly coupled, snap connection with the mask main body, magic Button connection or velcro connection.
In one embodiment of the invention, the mask is equipped with for prompting in the mask and/or the mask The colour atla of the service life of filtration members.
In one embodiment of the invention, have on the mask at least one opposite position in oral cavity, nasal cavity It is multiple-sealed.
Detailed description of the invention
Fig. 1 is the multilayer chamber schematic diagram of mask in the embodiment of the present invention.
Fig. 2 is closure member and recording device and public address set position view in mask in the embodiment of the present invention.
Fig. 3 is the position view of breather valve in the embodiment of the present invention.
Appended drawing reference:
Mask 1;Opening 11;Main body 12;Heat exchanger channels 13;First layer chamber 131;Second layer chamber 132;Exhaust outlet 1311;It exhales Inhale valve 1312;Closure member 14;Filtration members 141;Recording device 16;Public address set 17.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached The embodiment of figure description is exemplary, it is intended to is used to explain the present invention, and is not considered as limiting the invention.
As shown in Figure 1, mask 1 according to an embodiment of the present invention, the inside of mask 1 are formed with heat exchanger channels 13, user The gas of exhalation can be exchanged heat by heat exchanger channels and outside air, and one end of heat exchanger channels 13 extends to 1 inside of mask The position opposite with nasal cavity and/or oral cavity, the other end of heat exchanger channels 13 extend to the exterior space of connection mask 1, and heat exchange is logical Road 13 is made of the multilayer chamber being formed in mask 1.The gas of user's exhalation is after the heat exchange of multilayer chamber, the gas of exhalation It is unanimous on the whole with the gas temperature of external environment, it avoids the gas of exhalation from blowing to and generates water mist on glasses.
The gas of mask 1 according to an embodiment of the present invention, user's exhalation is carried out by heat exchanger channels 13 and outside air Heat exchange, in this process, the gas of exhalation can all be cooled by each layer of chamber specifically exports discharge up to gas passes through, Gas at this time is unanimous on the whole with ambient temperature, and the steam-laden gas of richness of exhalation would not be because of the rising of thermal current And it is atomized eyeglass.
The main reason for spectacle lens haze is because winter temperature is relatively low, and the temperature of glasses equally can be relatively low, and hot When gas reaches the spectacle lens of low temperature, hot gas will condense on the spectacle lens of low temperature, to haze.In order to solve this problem, Heat exchanger channels 13 are set in the present invention, are exchanged heat during air-flow with external environment, so as to reduce exhaled gas Temperature, when the temperature gap of exhaled gas temperature and external environment is smaller, even if gas exhalation reaches eyeglass, because will not The problem of hazing.
In the present invention, multilayer chamber may include the chamber of two layers of chamber, three layers of chamber or other quantity, include first with multilayer chamber For layer chamber 131 and second layer chamber 132.Wherein, exhaled gas passes through the space after first layer chamber 131 into second layer chamber 132 It is cooled down, is discharged by the gas after cooling of second layer chamber 132 by specific outlet, to complete the gas of user's exhalation The process of discharge, and gas is cooled down in this process.
As shown in Figure 1, in some embodiments of the invention, multilayer chamber is on edge from the inside of mask 1 (close to oral cavity or nose The side of chamber) to the direction successively nested arrangement of outside (close to the side of atmosphere), successively the chamber of nested arrangement will be from oral cavity The gas of middle exhalation successively cools down, until exhaled gas temperature and outside air temperature reach consistent or be insufficient to allow glasses mist Change.
In addition, the multilayer chamber in the present invention can also be sequentially arranged along the curve (not shown) of detour.
Further, the other end of heat exchanger channels 13 is equipped with exhaust outlet 1311,1311 direction of exhaust outlet and mask 1 and eye The opposite direction of eyeball is staggered.
For example, the direction of exhaust outlet can be obliquely, in front of face, upper front etc., but cannot rear (i.e. eye upward The position of mirror).When air-flow is discharged in this way, the direction that can face away from glasses sprays, and further avoids the occurrence of eyeglass and hazes The problem of, at this point, the phenomenon that will not hazing, safety is relatively high even if the gas converting heat of exhalation is not perfect.
Specifically, exhaled gas is after first layer chamber 131 so that multilayer chamber includes first layer chamber and second layer chamber as an example It is cooled down into the space of second layer chamber 132, while second layer chamber 132 being provided with exhaust outlet 1311, exhaust outlet 1311 is remote From and not towards glasses direction, so that most gases are logical after the gas of exhalation enters second layer chamber 132 from first layer chamber Room 131 The lesser exhaust outlet 1311 of resistance is crossed to be discharged.
Mask 1 according to an embodiment of the present invention, exhaled gas enter the sky of second layer chamber 132 after first layer chamber 131 Between, the direct contact lenses of exhaled gas are avoided, the gas into second layer chamber 132 can cool down, and be arranged in second layer chamber 132 Have far from and not towards the exhaust outlet in glasses direction 1311 so that the gas of exhalation enters second layer chamber 132 from first layer chamber 131 Afterwards, most gases are discharged by the lesser exhaust outlet 1311 of resistance, rather than rush at glasses, and when temperature is lower, it is steamed rich in water The thermal current of gas can make glasses atomization that people be caused not see.
Wherein, as shown in figure 3, the other end of heat exchanger channels 13 is equipped with breather valve 1312.When exhaling, the gas of discharge is just Pressure blows valve block open, rapidly excludes exhaust gas, feeling of oppression and heat when reducing using mask 1, and negative pressure when air-breathing can be automatically by valve Door is closed, to avoid the pollutant of inspiration external environment.
Further, referring to Fig. 2, the region opposite with oral cavity is provided with recording device 16 or for connecting record on mask 1 The interface of mixer 16, the region opposite with oral cavity is provided with public address set 17 or for connecting public address set 17 on mask 1 Interface.
Wherein, following several schemes and its combination are included at least:
The region opposite with oral cavity is provided with recording device 16 on mask 1;
The region opposite with oral cavity is provided with the interface for connecting recording device 16 on mask 1;
The region opposite with oral cavity is provided with public address set 17 on cover 1;
The region opposite with oral cavity is provided with the interface for connecting public address set 17 on mask 1.
Specifically, recording device 16 or public address set 17 are located near oral cavity, improve call when wearing mask 1 Quality also can be very good to be exchanged in a noisy environment, especially in the place of industrial premises etc, reduce because The operation error accidentally listened and generated ensure that construction efficiency and safety.
Referring to Fig.1, shown in 2, mask 1 includes: mask main body 12, closure member 14.In mask main body 12 with oral cavity and nasal cavity Opposite position is provided with opening 11, and for people when breathing or speaking, gas is into or out by opening 11, to realize Ventilation.
In addition, closure member 14 can be used for opening or closing opening 11, can be realized by singlehanded operation readiness and ambient atmosphere Connection, facilitate verbal communication and interim ventilative.
Wherein, closure member 14 includes one layer of filtration members 141, air by after 141 filtration, purification of filtration members of mask 1 again by People's sucking, ensure that people's sucking is clean air, and people is avoided to influence health because long-time sucks pernicious gas.
Certainly, closure member may also comprise arranged stacked or multiple filtration part 141 spaced apart from each other, make the more thorough of air cleaning Bottom, it is also safer.
Optionally, closure member 14 is threadedly coupled with mask main body 12, snaps connection, Velcro is connect or velcro connection, The connection with ambient atmosphere can be realized by singlehanded operation readiness, facilitate verbal communication and is temporarily breathed freely, in addition, being convenient for changing While, also there is certain bonding strength, it is not easily to fall off, guarantee in use intact of mask 1.
Further, mask 1 is equipped with the color for prompting the service life of filtration members 141 in mask 1 and/or mask 1 Card.
In other words, for being not provided with the masks 1 of filtration members, the service life that colour atla detects mask 1 can be passed through;For Mask 1 provided with filtration members can detect the service life of filtration members in mask 1 by colour atla, in order to replace in time, The use longevity that She blocks detection mask 1 and filtration members can also be respectively set in the service life that mask 1 can be detected by colour atla Life.
Refer to, in actual use, mask 1 and mistake by the service life that colour atla detects mask or filtration members The filter effect and strainability for filtering part are as the time reduces, at this point, one colour atla of setting, the color of colour atla is with mask or mistake The filter effect color of filter part changes, to achieve the purpose that the service life for detecting mask or filtration members.
In fact, can all retain dust etc., the face of mask or filtration members on mask or filter screen in mask use process Color will change.
In the present invention, mask 1 is combined with the design of depth color (such as gray scale) colour atla, according to mask 1 or the face of filtration members 141 Color ratio is to colour atla, and label has corresponding 1 performance parameter variations of mask on colour atla, convenient for users to control mask 1 or The color change of 1 filtration members 141 of mask is replaced in time.
In addition, on mask 1 at least one opposite position in oral cavity, nasal cavity have it is multiple-sealed, it is multiple-sealed to make sky Gas filters more thorough, improves the leakproofness of mask 1, namely improve the safety of mask 1.
The invention proposes a kind of gauze mask 1, it can be achieved that verbal communication quality is substantially improved when not plucking mask 1 And there is the call function that amplifies (being suitable for the places such as daily making and receiving calls, traffic police, industrial production), which can also be real Existing better sealing, possesses the advantages that avoiding glasses from being atomized in the case where not needing outlet valve, while the mask 1 can be reminded User replaces old mask 1 in time.
The present invention is mainly made of the following:
The mask 1 is provided with the convenient device for opening in part (such as by rotation, buckle design) near oral area, and convenient pair It is locally opened when words, guarantees quality of speaking.Every-day language when such as can be used for wearing mask 1, answer make a phone call, industrial production With intercom call, administrative law enforcement such as traffic police preaching etc..It is interior empty when the device for opening conveniently can also such as take bus Gas it is more pure and fresh but still selection wear mask 1 when, sense of feeling suffocated will not be generated.
The mask 1 is provided with Wireless/wired microphone device near oral area, cooperates the Wireless/wired equipment with being placed in, Sound of speaking and quality are further increased, can be used for the industrial production under noisy environment, it is also possible to which intercom call, administration are held Method such as traffic police etc..
The mask 1 is combined with the design of depth color (such as gray scale) colour atla, filters convenient for users to control mask 1 or mask 1 The color change of part is replaced in time.
The mask 1 improves the close of mask 1 using (multiple-sealed at such as mouth and nose) designs of multiple-sealed or multilayer chamber sealing Feng Xing.
The nasal cavity position of the mask 1 is using multilayer chamber (such as the double-deck chamber) nested Seal Design, so that exhaled gas is by the Space after one layer of chamber 131 into second layer chamber 132 is cooled down, and avoids the direct contact lenses of exhaled gas that glasses is caused to be atomized It does not see.Simultaneously can also second layer chamber 132 be provided with far from and not towards the exhaust outlet in glasses direction 1311 so that exhalation After gas enters second layer chamber 132 from first layer chamber Room 131, most gases are discharged by the lesser exhaust outlet 1311 of resistance, and It is non-to rush at glasses, prevent glasses to be atomized.
It is designed by this, glasses can be avoided to be atomized in the case where not using breather valve 1312.Certainly, this designs Breather valve 1312 can be cooperated to use.
The mask 1 is also provided with the interface of microphone, convenient to interconnect with microphone, so that microphone when wearing mask 1 It is placed near oral cavity, improves speech quality.
The mask main body 12 uses transparent composite, and there are two the replaceable mistakes with filtration members for design near mouth Device is filtered, which can be realized and ambient atmosphere by rotating or buckling opening ways by singlehanded operation readiness Connection facilitates verbal communication and temporarily breathes freely.Above-mentioned filter device is provided with depth variation colour atla, and it is corresponding to be marked with different colours 1 performance parameter variations of mask, and the color of the replacement filtration members is indicated, convenient for users to compareing and replacement is filtered in time Part.The mask 1 is being provided with Wireless amplification device 17 close to mouth region, convenient for amplifying for the noisy region such as industry, roadside Industry call and administrative law enforcement etc..The mask 1 uses multiple-sealed design, promotes 1 airtightness of mask.In the top (nose of mask 1 Near chamber) using the double-deck chamber Seal Design so that the hot and humid gas majority of exhalation enter the delay of outer layer chamber it is cooling after never court It is discharged to the direction of glasses, not will form glasses atomizating phenomenon.
Above-mentioned function can realize that can realize by Combined type mask 1 (has upper by the mask 1 of integrated design The device for stating function combines to form gauze mask 1 with common mask 1).
In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", " length ", " width ", " thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside", " up time The orientation or positional relationship of the instructions such as needle ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " be orientation based on the figure or Positional relationship is merely for convenience of description of the present invention and simplification of the description, rather than the device or element of indication or suggestion meaning must There must be specific orientation, be constructed and operated in a specific orientation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or Implicitly include at least one this feature.In the description of the present invention, the meaning of " plurality " is at least two, such as two, three It is a etc., unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc. Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral;It can be mechanical connect It connects, is also possible to be electrically connected;It can be directly connected, can also can be in two elements indirectly connected through an intermediary The interaction relationship of the connection in portion or two elements, unless otherwise restricted clearly.For those of ordinary skill in the art For, the specific meanings of the above terms in the present invention can be understood according to specific conditions.
In the present invention unless specifically defined or limited otherwise, fisrt feature in the second feature " on " or " down " can be with It is that the first and second features directly contact or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists Second feature " on ", " top " and " above " but fisrt feature be directly above or diagonally above the second feature, or be merely representative of First feature horizontal height is higher than second feature.Fisrt feature can be under the second feature " below ", " below " and " below " One feature is directly under or diagonally below the second feature, or is merely representative of first feature horizontal height less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office It can be combined in any suitable manner in one or more embodiment or examples.In addition, without conflicting with each other, the skill of this field Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples It closes and combines.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned Embodiment is changed, modifies, replacement and variant.

Claims (10)

1. a kind of mask, which is characterized in that the inside of the mask is formed with heat exchanger channels, and one end of the heat exchanger channels extends The position opposite with nasal cavity and/or oral cavity on the inside of to the mask, the other end of the heat exchanger channels extend to described in connection The exterior space of mask, the heat exchanger channels are made of the multilayer chamber being formed in the mask.
2. mask according to claim 1, which is characterized in that the multilayer chamber is along from the inside of the mask to outside Successively nested arrangement or the curve along detour are sequentially arranged in direction.
3. mask according to claim 1, which is characterized in that the outgassing direction of the other end of the heat exchanger channels with The mask direction opposite with eyes is staggered.
4. mask according to claim 1, which is characterized in that the other end of the heat exchanger channels is equipped with breather valve.
5. mask according to claim 1, which is characterized in that the region opposite with oral cavity is provided with recording on the mask Device or interface for connecting recording device;And/or
The region opposite with oral cavity is provided with public address set or the interface for connecting public address set on the mask.
6. mask according to any one of claims 1-5, which is characterized in that the mask includes:
Mask main body, the position opposite with oral cavity is provided with opening in the mask main body;
Closure member, the closure member is openable or closes the opening.
7. mask according to claim 6, which is characterized in that
The closure member includes one layer of filtration members;Or
The closure member includes arranged stacked or multiple filtration part spaced apart from each other.
8. mask according to claim 6, which is characterized in that the closure member is threadedly coupled with the mask main body, blocks Button connection, Velcro connection or velcro connection.
9. mask according to any one of claims 1-5, which is characterized in that the mask is equipped with described for prompting The colour atla of the service life of filtration members in mask and/or the mask.
10. mask according to claim 1, which is characterized in that opposite at least one in oral cavity, nasal cavity on the mask Position have it is multiple-sealed.
CN201810214590.6A 2018-03-15 2018-03-15 Mask Pending CN110269290A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201810214590.6A CN110269290A (en) 2018-03-15 2018-03-15 Mask

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201810214590.6A CN110269290A (en) 2018-03-15 2018-03-15 Mask

Publications (1)

Publication Number Publication Date
CN110269290A true CN110269290A (en) 2019-09-24

Family

ID=67958120

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201810214590.6A Pending CN110269290A (en) 2018-03-15 2018-03-15 Mask

Country Status (1)

Country Link
CN (1) CN110269290A (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203072973U (en) * 2013-02-03 2013-07-24 罗福仲 Mask with movable window
CN204132469U (en) * 2014-09-16 2015-02-04 杭州韦尔茂通环境技术有限公司 A kind of gauze mask containing anthocyanidin filter material
CN204861312U (en) * 2015-08-13 2015-12-16 中国人民解放军第四军医大学 Fungi -proofing formula public address gauze mask
CN107259674A (en) * 2017-07-05 2017-10-20 王恒成 A kind of new nasal-suction type mouth mask
CN208096075U (en) * 2018-03-15 2018-11-16 国家电投集团科学技术研究院有限公司 Mask

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203072973U (en) * 2013-02-03 2013-07-24 罗福仲 Mask with movable window
CN204132469U (en) * 2014-09-16 2015-02-04 杭州韦尔茂通环境技术有限公司 A kind of gauze mask containing anthocyanidin filter material
CN204861312U (en) * 2015-08-13 2015-12-16 中国人民解放军第四军医大学 Fungi -proofing formula public address gauze mask
CN107259674A (en) * 2017-07-05 2017-10-20 王恒成 A kind of new nasal-suction type mouth mask
CN208096075U (en) * 2018-03-15 2018-11-16 国家电投集团科学技术研究院有限公司 Mask

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
轻工业部甜菜糖业科学研究所 主编: "《甜菜制糖工业手册》", 31 January 1981, 轻工业出版社, pages: 301 *

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