CN103418093B - A kind of dust mask for mine safety - Google Patents
A kind of dust mask for mine safety Download PDFInfo
- Publication number
- CN103418093B CN103418093B CN201310388327.6A CN201310388327A CN103418093B CN 103418093 B CN103418093 B CN 103418093B CN 201310388327 A CN201310388327 A CN 201310388327A CN 103418093 B CN103418093 B CN 103418093B
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- layer
- face shield
- dust
- mine safety
- mask
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- 239000000428 dust Substances 0.000 title claims abstract description 39
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 54
- 238000001914 filtration Methods 0.000 claims description 48
- 230000001413 cellular effect Effects 0.000 claims description 33
- 239000011941 photocatalyst Substances 0.000 claims description 31
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 22
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims description 22
- 239000011159 matrix material Substances 0.000 claims description 16
- 239000004408 titanium dioxide Substances 0.000 claims description 16
- 238000005229 chemical vapour deposition Methods 0.000 claims description 8
- 239000011248 coating agent Substances 0.000 claims description 8
- 238000000576 coating method Methods 0.000 claims description 8
- 238000007747 plating Methods 0.000 claims description 8
- 229910052799 carbon Inorganic materials 0.000 claims description 6
- 210000003928 nasal cavity Anatomy 0.000 claims description 6
- 238000005728 strengthening Methods 0.000 claims description 5
- 230000000295 complement effect Effects 0.000 claims description 4
- 239000004743 Polypropylene Substances 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 238000012986 modification Methods 0.000 claims description 3
- 230000004048 modification Effects 0.000 claims description 3
- -1 polypropylene Polymers 0.000 claims description 3
- 229920001155 polypropylene Polymers 0.000 claims description 3
- 239000004411 aluminium Substances 0.000 claims description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical group [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- 238000005266 casting Methods 0.000 claims description 2
- 229910001095 light aluminium alloy Inorganic materials 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- 239000004033 plastic Substances 0.000 claims description 2
- 230000029058 respiratory gaseous exchange Effects 0.000 abstract description 2
- 230000001954 sterilising effect Effects 0.000 abstract 1
- 238000004659 sterilization and disinfection Methods 0.000 abstract 1
- 239000003245 coal Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 241000894006 Bacteria Species 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000001179 sorption measurement Methods 0.000 description 3
- 108090000765 processed proteins & peptides Proteins 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910001069 Ti alloy Inorganic materials 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000009931 harmful effect Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
Landscapes
- Respiratory Apparatuses And Protective Means (AREA)
Abstract
The invention discloses a kind of dust mask for mine safety, comprise mask body shell, face shield filter, face shield support portion, face shield filter replacement port, gas make-up portion and wearable components.By concrete setting, achieve and can carry out filter sterilization to dust under ore deposit, for staff under ore deposit creates relatively good breathing environment, under better guarantee ore deposit, staff's is healthy.
Description
Technical field
The present invention relates to a kind of air cleaning unit, to be specifically related under a kind of ore deposit particularly dust mask for mine safety.
Background technology
In colliery there is huge hidden danger for safety of coal mines in the existence of dust, and there is a lot of dust arrester in current colliery, but few people pay close attention to the process of the absorption type dust of staffs in coal mine.Various mine, particularly colliery, practitioner's working environment and severe.The control that current country sucks human body for downhole powder dust is more and more stricter, and the healthy of staffs in coal mine also more and more comes into one's own, and is therefore starved of and develops a kind of dust mask that can ensure staffs in coal mine breathing environment.
And down-hole practitioner wears mouth mask mostly at present, and existing routine is medical and civilian mouth mask can only block conventional larger dust, the mouth mask that can filter commercially is laid claim to although existing, but because common mouth mask has just carried out thickening process by it, poor filtration effect and easily cause unsmooth breath, also can be fitted on nasal cavity time soft mouth mask is worn, thus cause the discomfort of user; Most importantly the dust removing effects of mouth mask does not reach the demand of down-hole practitioner far away.
Summary of the invention
The object of the invention is to propose a kind of dust mask for mine safety;
For reaching this object, the present invention by the following technical solutions:
A kind of dust mask for mine safety, comprise mask body shell, face shield filter, face shield support portion, face shield filter replacement port, gas make-up portion and wearable components, it is characterized in that, described face shield filter is layer structure, be made up of skin, nexine and intermediate layer respectively, described skin and nexine are nonwoven layer; Described face shield support portion adopts horminess metal wire to make; Described gas make-up portion comprises external shell and gas complementary ring, and described gas make-up portion is arranged on outside the face shield filter of mask body shell, is positioned at the middle and lower part of mask body shell;
Intermediate layer in the layer structure of described face shield filter comprises dust-filtering stratum reticulare; Described dust-filtering stratum reticulare comprises the first cellular photocatalyst filtering net layer, is positioned at the first immobilized nano titanium oxide filter mesh layer of described cellular photocatalyst filtering net layer side, is positioned at the second cellular photocatalyst filtering net layer of described first immobilized nano titanium oxide filter mesh layer opposite side and is positioned at the second immobilized nano titanium oxide filter mesh layer of described second cellular photocatalyst filtering net layer opposite side; The aperture of described first cellular photocatalyst filtering net layer is 0.35 ~ 0.5mm, and thickness is 0.3 ~ 0.5mm; The aperture of the second cellular photocatalyst filtering net layer is 0.55 ~ 0.6mm, and thickness is 0.15 ~ 0.35mm; In the matrix of described first immobilized nano titanium oxide filter mesh layer, the volume content of active carbon is 52 ~ 63%, the ultramicrofine nanometer titanium dioxide layer of Activated carbon matrix coating surface, and nanometer titanium dioxide layer adopts CVD method to carry out plating; In the matrix of described second immobilized nano titanium oxide filter mesh layer, the volume content of active carbon is 66 ~ 68%, the ultramicrofine nanometer titanium dioxide layer of Activated carbon matrix coating surface, and nanometer titanium dioxide layer adopts CVD method to carry out plating; Described dust-filtering stratum reticulare is also included in the electrostatic electret fleece that described first cellular photocatalyst filtering net layer opposite side is arranged, and described electrostatic electret fleece is the electrostatic electret fleece by polypropylene modification.
As preferably, the ring portion of described gas make-up ring is hollow ring structure, the ring portion that whole hollow ring structure is formed is defined as gas outlet, the outlet of hollow ring structure is nozzle ring, by the suction of nozzle ring jet-stream wind, the air velocity of described gas outlet and pressure differential are amplified, thus strengthening is breathed.
As preferably, the fibroreticulate thickness of described electrostatic electret is 80 ~ 120 μm; Described cellular photocatalyst filtering net layer is aluminium matter cellular material.
As preferably, described inner support portion is hemispherical, billiard table shape or hemisphere and nasal cavity adapt to shape cooperation shape.
As preferably, described face shield filter replacement port designs for blade inserting, and the stereoplasm frame arranged by the edge of face shield filter can dismountable replacing face shield filter.
As preferably, the gas access of the ring portion hollow ring structure of described gas make-up ring connects a gas supply part by flexible pipe.
As preferably, described gas supply part is by the battery-powered micro air pump of micro electric, and described micro air pump connects the rear neck end being arranged on the personnel of wearing by flexible pipe.
As preferably, described wearable components is resilient clamp member, by the elasticity gemel connection with mask body shell both sides, dust mask is securely held on the face of wearer, the afterbody of described resilient clamp member is also provided with buckle connecting band, and the resilient clamp member being connected both sides by buckle connecting band is integrated.
As preferably, described mask body shell is the light aluminum alloy thin plate of mold casting forming or integrated sheet plastic.
As preferably, described horminess metal wire is stainless steel wire, aluminum-alloy wire or titanium alloy wire.
Effect of the present invention is:
By arranging concrete aperture and the thickness of each layer of filtering meshes, making this filtering meshes while guarantee adsorption fouling thing and bacterium, ensureing that gas passes through efficiency.The more existing aperture of design in the present invention's each layer aperture is comparatively large, but owing to being provided with four-layer network layer, can ensureing that filter efficiency reaches more than 90%, but can not cause gas flow difficulties again;
By arranging electrostatic electret fleece in the overall side of filtering meshes, strengthening adsorption efficiency, but owing to being only provided with one deck, and it is in the side of overall stratum reticulare, during use, be arranged on the side away from human body, then it can be avoided the injury of human body, by test, it enhances micronic dust adsorption efficiency in the process of absorption micronic dust, but due to four layers of filter course of being at least separated by between itself and human body, does not bring any harmful effect to human body;
Face shield is provided with face shield filter replacement port, and after filtering meshes absorption certain hour, can be easy to replace it, the screen pack after replacing it can be concentrated and be sent to professional institution and unload, recycling;
Creationary Koln is reached nozzle application in dust mask, air flowing can be strengthened without the need to blade rotary, when user feels unsmooth breath, gas make-up ring can be enabled reach the object helping to breathe.
Accompanying drawing explanation
Fig. 1 is the layer structure schematic diagram of the dust-filtering stratum reticulare of dust mask for mine safety;
Fig. 2 is the dust mask schematic diagram of the present invention not containing gas make-up portion;
Fig. 3 is the dust mask schematic diagram of the present invention containing gas make-up portion;
Fig. 4 is the section nozzles schematic diagram in gas make-up portion used in the present invention in Fig. 3.
Wherein: 1, the first cellular photocatalyst filtering net layer; 2, first immobilized nano titanium oxide filter mesh layer; 3, second cellular photocatalyst filtering net layer; 4 second immobilized nano titanium oxide filter mesh layers; 10, mask body shell; 11, face shield filter; 12, face shield filter replacement port; 13, wearable components; 14, adapt to shape cooperation position with nasal cavity in face shield support portion; 16, gas make-up portion; 17, flexible pipe; 18, gas supply part; 21, hollow ring structure; 22, orifice gas starts extruding place; 23, orifice gas forms jet place; 24, the outer outlets of nozzle; 25, the shell of hollow ring structure; 26, orifice gas exports; 27, the interior side outlet of nozzle.
Detailed description of the invention
Embodiment 1
In dust mask for mine safety as shown in Figure 1, the intermediate layer of filter is dust-filtering stratum reticulare, described dust-filtering stratum reticulare comprises the first cellular photocatalyst filtering net layer, be positioned at the first immobilized nano titanium oxide filter mesh layer of described cellular photocatalyst filtering net layer side, be positioned at the second cellular photocatalyst filtering net layer of described first immobilized nano titanium oxide filter mesh layer opposite side and be positioned at the second immobilized nano titanium oxide filter mesh layer of described second cellular photocatalyst filtering net layer opposite side, the aperture of described first cellular photocatalyst filtering net layer is 0.4mm, thickness is 0.32mm, the aperture of the second cellular photocatalyst filtering net layer is 0.56mm, and thickness is 0.30mm, in the matrix of described first immobilized nano titanium oxide filter mesh layer, the volume content of active carbon is 56%, the ultramicrofine nanometer titanium dioxide layer of Activated carbon matrix coating surface, and nanometer titanium dioxide layer adopts CVD method to carry out plating, in the matrix of described second immobilized nano titanium oxide filter mesh layer, the volume content of active peptide is 67%, the ultramicrofine nanometer titanium dioxide layer of Activated carbon matrix coating surface, and nanometer titanium dioxide layer adopts CVD method to carry out plating, dust-filtering stratum reticulare is also included in the electrostatic electret fleece (not shown) that the first cellular photocatalyst filtering net layer opposite side is arranged, and described electrostatic electret fleece is the electrostatic electret fleece by polypropylene modification.The PM2.5 dust of the present embodiment and the filter efficiency of bacterium can reach 98%.
Embodiment 2
In dust mask for mine safety as shown in Figure 1, the intermediate layer of filter is dust-filtering stratum reticulare, , dust-filtering stratum reticulare comprises the first cellular photocatalyst filtering net layer, be positioned at the first immobilized nano titanium oxide filter mesh layer of described cellular photocatalyst filtering net layer side, be positioned at the second cellular photocatalyst filtering net layer of described first immobilized nano titanium oxide filter mesh layer opposite side and be positioned at the second immobilized nano titanium oxide filter mesh layer of described second cellular photocatalyst filtering net layer opposite side, the aperture of described first cellular photocatalyst filtering net layer is 0.38mm, thickness is 0.45mm, the aperture of the second cellular photocatalyst filtering net layer is 0.59mm, and thickness is 0.29mm, in the matrix of described first immobilized nano titanium oxide filter mesh layer, the volume content of active carbon is 61%, the ultramicrofine nanometer titanium dioxide layer of Activated carbon matrix coating surface, and nanometer titanium dioxide layer adopts CVD method to carry out plating, in the matrix of described second immobilized nano titanium oxide filter mesh layer, the volume content of active peptide is 67.5%, the ultramicrofine nanometer titanium dioxide layer of Activated carbon matrix coating surface, and nanometer titanium dioxide layer adopts CVD method to carry out plating.The PM2.5 dust of the present embodiment and the filter efficiency of bacterium reach 91%.
Embodiment 3
As shown in Figures 2 and 3, dust mask for mine safety, comprise mask body shell, face shield filter, face shield support portion, face shield filter replacement port, gas make-up portion and wearable components, described face shield filter is layer structure, is made up of respectively skin, nexine and intermediate layer; Described face shield support portion adopts albronze silk to make; Described gas make-up portion comprises external shell and gas complementary ring, and described gas make-up portion is arranged on outside the face shield filter of mask body shell, is positioned at the middle and lower part of mask body shell; Face shield support portion is that hemisphere and nasal cavity adapt to shape cooperation shape; Described wearable components is resilient clamp member, by the elasticity gemel connection with mask body shell both sides, dust mask is securely held on the face of wearer, the afterbody of described resilient clamp member is also provided with buckle connecting band, and the resilient clamp member being connected both sides by buckle connecting band is integrated.
Embodiment 4
Dust mask for mine safety as shown in Figure 3 and Figure 4, comprise mask body shell, face shield filter, face shield support portion, face shield filter replacement port, gas make-up portion and wearable components, described face shield filter is layer structure, is made up of respectively skin, nexine and intermediate layer; Described face shield support portion adopts albronze silk to make; Described gas make-up portion comprises external shell and gas complementary ring, and described gas make-up portion is arranged on outside the face shield filter of mask body shell, is positioned at the middle and lower part of mask body shell; Face shield support portion is that hemisphere and nasal cavity adapt to shape cooperation shape; Described wearable components is resilient clamp member, by the elasticity gemel connection with mask body shell both sides, dust mask is securely held on the face of wearer, the afterbody of described resilient clamp member is also provided with buckle connecting band (not shown), and the resilient clamp member being connected both sides by buckle connecting band is integrated.The ring portion of described gas make-up ring is hollow ring structure, the ring portion that whole hollow ring structure is formed is defined as gas outlet, the outlet of hollow ring structure is nozzle ring, by the suction of nozzle ring jet-stream wind, the air velocity of described gas outlet and pressure differential are amplified, thus strengthening is breathed.The gas access of the ring portion hollow ring structure of described gas make-up ring connects a gas supply part by flexible pipe, micro electric battery-powered minitype gas pump is adopted to carry out air feed by above-mentioned flexible pipe to hollow partial interior, thus breathe in oral area strengthening of giving vent to anger, this gas supply part is arranged on the rear neck end of the personnel that wear of the afterbody of hard elastic ear hold assembly, and flexible pipe is arranged on hold assembly inside.
Claims (9)
1. a dust mask for mine safety, comprise mask body shell, face shield filter, face shield support portion, face shield filter replacement port, gas make-up portion and wearable components, it is characterized in that, described face shield filter is layer structure, is made up of respectively skin, nexine and intermediate layer; Described face shield support portion adopts horminess metal wire to make; Described gas make-up portion comprises external shell and gas complementary ring, and described gas make-up portion is arranged on outside the face shield filter of mask body shell, is positioned at the middle and lower part of mask body shell;
Intermediate layer in the layer structure of described face shield filter comprises dust-filtering stratum reticulare; Described dust-filtering stratum reticulare comprises the first cellular photocatalyst filtering net layer, is positioned at the first immobilized nano titanium oxide filter mesh layer of described cellular photocatalyst filtering net layer side, is positioned at the second cellular photocatalyst filtering net layer of described first immobilized nano titanium oxide filter mesh layer opposite side and is positioned at the second immobilized nano titanium oxide filter mesh layer of described second cellular photocatalyst filtering net layer opposite side; The aperture of described first cellular photocatalyst filtering net layer is 0.38 ~ 0.5mm, and thickness is 0.3 ~ 0.45mm; The aperture of the second cellular photocatalyst filtering net layer is 0.59 ~ 0.6mm, and thickness is 0.29 ~ 0.35mm; In the matrix of described first immobilized nano titanium oxide filter mesh layer, the volume content of active carbon is 52 ~ 61%, the ultramicrofine nanometer titanium dioxide layer of Activated carbon matrix coating surface, and nanometer titanium dioxide layer adopts CVD method to carry out plating; In the matrix of described second immobilized nano titanium oxide filter mesh layer, the volume content of active carbon is 66 ~ 68%, the ultramicrofine nanometer titanium dioxide layer of Activated carbon matrix coating surface, and nanometer titanium dioxide layer adopts CVD method to carry out plating; Described dust-filtering stratum reticulare is also included in the electrostatic electret fleece that described first cellular photocatalyst filtering net layer opposite side is arranged, and described electrostatic electret fleece is the electrostatic electret fleece by polypropylene modification:
The ring portion of described gas make-up ring is hollow ring structure, the ring portion that whole hollow ring structure is formed is defined as gas outlet, the outlet of hollow ring structure is nozzle ring, by the suction of nozzle ring jet-stream wind, the air velocity of described gas outlet and pressure differential are amplified, thus strengthening is breathed.
2. dust mask for mine safety according to claim 1, is characterized in that, the fibroreticulate thickness of described electrostatic electret is 80 ~ 120 μm; Described cellular photocatalyst filtering net layer is aluminium matter cellular material.
3. dust mask for mine safety according to claim 1, is characterized in that, described face shield support portion is hemispherical, billiard table shape or hemisphere and nasal cavity adapt to shape cooperation shape.
4. dust mask for mine safety according to claim 1, is characterized in that, described face shield filter replacement port designs for blade inserting, and the stereoplasm frame arranged by the edge of face shield filter can dismountable replacing face shield filter.
5. dust mask for mine safety according to claim 1, is characterized in that, the gas access of the ring portion hollow ring structure of described gas make-up ring connects a gas supply part by flexible pipe.
6. dust mask for mine safety according to claim 5, is characterized in that, described gas supply part is by the battery-powered micro air pump of micro electric, and described micro air pump connects the rear neck end being arranged on the personnel of wearing by flexible pipe.
7. dust mask for mine safety according to claim 1 or 5, it is characterized in that, described wearable components is resilient clamp member, by the elasticity gemel connection with mask body shell both sides, dust mask is securely held on the face of wearer, the afterbody of described resilient clamp member is also provided with buckle connecting band, and the resilient clamp member being connected both sides by buckle connecting band is integrated.
8. dust mask for mine safety according to claim 1 or 5, it is characterized in that, described mask body shell is the light aluminum alloy thin plate of mold casting forming or integrated sheet plastic.
9. dust mask for mine safety according to claim 1 or 5, it is characterized in that, described skin and nexine are nonwoven layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310388327.6A CN103418093B (en) | 2013-09-01 | 2013-09-01 | A kind of dust mask for mine safety |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310388327.6A CN103418093B (en) | 2013-09-01 | 2013-09-01 | A kind of dust mask for mine safety |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103418093A CN103418093A (en) | 2013-12-04 |
| CN103418093B true CN103418093B (en) | 2015-09-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310388327.6A Expired - Fee Related CN103418093B (en) | 2013-09-01 | 2013-09-01 | A kind of dust mask for mine safety |
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| Country | Link |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105214237A (en) * | 2015-11-13 | 2016-01-06 | 朱忠良 | A kind of breathing mask of applicable high pollution weather |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105214236A (en) * | 2015-11-13 | 2016-01-06 | 朱忠良 | A kind of breathing mask of applicable high pollution weather |
| CN105615049B (en) * | 2016-01-09 | 2017-09-08 | 东华大学 | A kind of intelligent protection mouth mask |
| CN105935171B (en) * | 2016-06-16 | 2018-07-13 | 国网江苏省电力公司靖江市供电公司 | Security protection mask |
| CN106334281A (en) * | 2016-08-23 | 2017-01-18 | 孟玲 | Safety face mask applied to coal mine |
| CN112089995B (en) * | 2020-09-21 | 2021-10-08 | 淮北市菲美得环保科技有限公司 | Haze (PM2.5) prevention mask |
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| GB431671A (en) * | 1934-12-21 | 1935-07-12 | Reginald Percy Howes | Respirator for personal use |
| US4233972A (en) * | 1978-05-08 | 1980-11-18 | Wolfgang Hauff | Portable air filtering and breathing assist device |
| CN1076633A (en) * | 1992-11-19 | 1993-09-29 | 房坤 | Dust-proof mask with blower ventilation |
| CN1162211C (en) * | 1999-09-17 | 2004-08-18 | 上海维来现代科技发展有限公司 | Photocatalytic air-purifying net in multilayer structure and is making process |
| SE514464C2 (en) * | 2000-01-11 | 2001-02-26 | Paul Eksell | Oxygen mask with filter material and outlet holes |
| GB2464736A (en) * | 2008-10-25 | 2010-04-28 | Dyson Technology Ltd | Fan with a filter |
| US8166972B2 (en) * | 2008-11-14 | 2012-05-01 | Shahriar Daliri | Antiseptic mask and method of using antiseptic mask |
| CN201523692U (en) * | 2009-11-13 | 2010-07-14 | 康健 | Multifunctional reusable mask |
| CN201771809U (en) * | 2010-08-18 | 2011-03-23 | 无锡英威华耀科技有限公司 | Pneumatic electric fan |
| CN202524189U (en) * | 2011-08-19 | 2012-11-07 | 德昌电机(深圳)有限公司 | Brushless motor and bladeless fan using the same |
| CN102410586A (en) * | 2011-12-09 | 2012-04-11 | 江苏瑞丰科技实业有限公司 | Purification treatment device for PM2.5-level dust collecting and carried bacterium killing |
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2013
- 2013-09-01 CN CN201310388327.6A patent/CN103418093B/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105214237A (en) * | 2015-11-13 | 2016-01-06 | 朱忠良 | A kind of breathing mask of applicable high pollution weather |
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