CN106510049A - Sterilization and dehumidification mask with high filter element replaceability - Google Patents
Sterilization and dehumidification mask with high filter element replaceability Download PDFInfo
- Publication number
- CN106510049A CN106510049A CN201611089407.1A CN201611089407A CN106510049A CN 106510049 A CN106510049 A CN 106510049A CN 201611089407 A CN201611089407 A CN 201611089407A CN 106510049 A CN106510049 A CN 106510049A
- Authority
- CN
- China
- Prior art keywords
- sterilization
- mask
- nanometer
- layer
- replaceable cartridge
- 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.)
- Withdrawn
Links
Classifications
-
- A—HUMAN NECESSITIES
- A41—WEARING APPAREL
- A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
- A41D13/00—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches
- A41D13/05—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches protecting only a particular body part
- A41D13/11—Protective face masks, e.g. for surgical use, or for use in foul atmospheres
- A41D13/1192—Protective face masks, e.g. for surgical use, or for use in foul atmospheres with antimicrobial agent
-
- A—HUMAN NECESSITIES
- A41—WEARING APPAREL
- A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
- A41D27/00—Details of garments or of their making
-
- A—HUMAN NECESSITIES
- A41—WEARING APPAREL
- A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
- A41D31/00—Materials specially adapted for outerwear
- A41D31/04—Materials specially adapted for outerwear characterised by special function or use
- A41D31/30—Antimicrobial, e.g. antibacterial
- A41D31/305—Antimicrobial, e.g. antibacterial using layered materials
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
- D06M11/73—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with carbon or compounds thereof
- D06M11/74—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with carbon or compounds thereof with carbon or graphite; with carbides; with graphitic acids or their salts
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
- D06M11/77—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with silicon or compounds thereof
- D06M11/79—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with silicon or compounds thereof with silicon dioxide, silicic acids or their salts
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
- D06M11/83—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with metals; with metal-generating compounds, e.g. metal carbonyls; Reduction of metal compounds on textiles
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
- D06M13/322—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing nitrogen
- D06M13/402—Amides imides, sulfamic acids
- D06M13/41—Amides derived from unsaturated carboxylic acids, e.g. acrylamide
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M16/00—Biochemical treatment of fibres, threads, yarns, fabrics, or fibrous goods made from such materials, e.g. enzymatic
-
- A—HUMAN NECESSITIES
- A41—WEARING APPAREL
- A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
- A41D2300/00—Details of garments
- A41D2300/30—Closures
- A41D2300/322—Closures using slide fasteners
-
- A—HUMAN NECESSITIES
- A41—WEARING APPAREL
- A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
- A41D2400/00—Functions or special features of garments
- A41D2400/70—Removability
-
- A—HUMAN NECESSITIES
- A41—WEARING APPAREL
- A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
- A41D31/00—Materials specially adapted for outerwear
- A41D31/04—Materials specially adapted for outerwear characterised by special function or use
- A41D31/30—Antimicrobial, e.g. antibacterial
Abstract
The invention discloses a sterilization and dehumidification mask with high filter element replaceability. The mask comprises a mask body and ear hooks. The mask body includes a breathable cotton layer and a sterilization layer, wherein the two layers are connected by a zipper. A plurality of interlayers are arranged between the breathable cotton layer and the sterilization layer; and the space for accommodating a filter element is formed between the adjacent interlayers. An accommodation bag is arranged between the breathable cotton layer and the sterilization layer; and a water absorption resin bag is arranged in the accommodation bag. The sterilization layer bonds with rare earth, a nano-silver material, graphene, and a nano mineral substance byacrylamide. The mask has the good sterilization effect; filter elements with different effects can be selected to adapt to different environments; and the water absorption resin bag in the accommodation bag can absorb moisture to avoid bacteria breeding, so that the wearing comfort level is enhanced.
Description
Technical field
The present invention relates to a kind of mask, more particularly to a kind of sterilization of replaceable cartridge is except wet mask.
Background technology
Used as a kind of daily protection hygienic article, which covers on the outside of the mouth and nose of people mask, can be to oral cavity, nasal cavity week
Enclose the dust particle in air to be adhered to and adsorbed.In society now, mask is in Precision Machining, food Pharmaceutical, closing exploitation
Deng field of industrial production have widely apply.The usual performance of mask widely used at present is single, and filter element cannot be changed,
The different environmental aspect in each city cannot be adapted to；And the textile fabric that conventional mask is generally made up of fiber, it is many due to which
The chemical constitution of cellular type body form and high molecular polymer beneficial to microorganism adhere to, become antibacterial, microbe survival, breeding
Good parasitic body.Therefore, it is people's technical problem in the urgent need to address cloth to be carried out sterilizing.
In view of the drawbacks described above of prior art, the technical problem to be solved is to provide a kind of replaceable cartridge
Sterilization remove wet mask.
For achieving the above object, the invention provides a kind of sterilization of replaceable cartridge removes wet mask, including mask body
And ear-hang, the mask body includes ventilative cotton layer and degerming layer；The ventilative cotton layer and degerming layer are connected by zipper, described
Several interlayers are provided between ventilative cotton layer and degerming layer, form the space that can accommodate filter element between the adjacent interlayer；Institute
State and between ventilative cotton layer and degerming layer, be provided with bag container, in the bag container, be placed with water-absorbing resin bag；The degerming layer leads to
Cross acrylamide and be bonded with rare earth, nanometer silver, Graphene and nanometer mineral matters, wherein acrylamide is 10 parts, rare earth is 5 parts,
Nanometer silver is 2 parts, Graphene is 10 parts, and nanometer mineral matters are 2 parts.
Ventilative cotton layer and degerming layer can be beaten as opening wallet by slide fastener by above structure, ventilative cotton layer with degerming layer
Open, the filter element of corresponding function can be selected to be placed in adjacent interbedded space according to the demand of oneself；Water-absorbing resin bag
Steam in adsorbable mask, it is to avoid bacteria breed, improves wear comfort；Degerming layer contain rare earth, nanometer silver, Graphene and
Nanometer mineral matters, the bactericidal effect of the combination material of above proportioning are good, and sterilization stability is high, and compositionss are unlikely to deform.
Preferably, being provided with the catch that can cover the slide fastener in the mask body.Catch can prevent air without
Degerming layer, is directly entered directly in mask by the gap of slide fastener, it is ensured that air enters back into mask Jing after the sterilization of degerming layer
In.
Preferably, the degerming layer is non-woven fabrics.
Preferably, the degerming layer for being bonded with rare earth, nanometer silver, Graphene and nanometer mineral matters is through microwave heating method
Process.
Preferably, the degerming layer for being bonded with rare earth, nanometer silver, Graphene and nanometer mineral matters is through ultrasonic reducing process
Process.
Preferably, the degerming layer for being bonded with rare earth, nanometer silver, Graphene and nanometer mineral matters is reduced through light quantum
Method process.
Preferably, the degerming layer for being bonded with rare earth, nanometer silver, Graphene and nanometer mineral matters is through electrochemical reduction
Method process.
Above process step, compositionss are adsorbed on degerming layer, and degerming layer has the strong on-deformable advantage of toughness, and
Uniform good breathability and bactericidal effect.
Preferably, the nanometer mineral matters are stone needle.
Preferably, the nanometer silver is prepared by following methods：
The concentration of silver nitrate solution is 0.05mol/l, and PH=7, sintering temperature are 300 DEG C, and sintering 2h obtains mean diameter
For the ball-type powder body of 50nm, when nanometer silver powder content is in 9 μ g/ml, the killing rate to colibacillary staphylococcus aureuses
For 100%, with ethyl acetate as disperse medium, when pH=6, shear rate 6000r/min, shear time 24h, addition slurry
Implant, prepares the more stable nanometer silver dispersion pulp of dispersive property under ultrasound wave dispersion and mechanical agitation, is sunk with uniform
Form sediment nano silver powder is prepared with the method that high temperature thermal decomposition combines.
The invention has the beneficial effects as follows：The mask bactericidal effect of the present invention is good；The filter element of not same-action is may be selected, is adapted to
Different environmental aspects；The adsorbable steam of water-absorbing resin bag in bag container, improves wear comfort.
Description of the drawings
Fig. 1 is the expansion planar structure schematic diagram of the present invention.
Fig. 2 is the overlooking the structure diagram of Fig. 1.
Specific embodiment
With reference to embodiment and accompanying drawing, the invention will be further described：
As shown in Figures 1 and 2, a kind of sterilization of replaceable cartridge removes wet mask, including mask body 1 and ear-hang 2,
Mask body 1 includes ventilative cotton layer 3 and degerming layer 4；Degerming layer 4 is non-woven fabrics, and ventilative cotton layer 3 and degerming layer 4 are connected by slide fastener 5
Connect, in mask body 1, be provided with the catch 8 that can cover slide fastener 4；Several interlayers are provided between ventilative cotton layer 3 and degerming layer 4
6, the space that can accommodate filter element is formed between adjacent interlayer 6；Bag container 7 is provided between ventilative cotton layer 3 and degerming layer 4, is accommodated
Water-absorbing resin bag is placed with bag 7；Degerming layer 4 is bonded with rare earth, nanometer silver, Graphene and nano-mineral by acrylamide
Matter；Wherein acrylamide is 10 parts, and rare earth is 5 parts, nanometer silver is 2 parts, Graphene is 10 parts, and nanometer mineral matters are 2 parts；Bonding
There is the degerming layer 4 of rare earth, nanometer silver, Graphene and nanometer mineral matters through microwave heating method, ultrasonic reducing process, light quantum reduction
Method, electrochemical reducing process.
In the present embodiment, nanometer mineral matters are stone needle.The nanometer silver is prepared by following methods：
The concentration of silver nitrate solution is 0.05mol/l, and PH=7, sintering temperature are 300 DEG C, and sintering 2h obtains mean diameter
For the ball-type powder body of 50nm, when nanometer silver powder content is in 9 μ g/ml, the killing rate to colibacillary staphylococcus aureuses
For 100%, with ethyl acetate as disperse medium, when pH=6, shear rate 6000r/min, shear time 24h, addition slurry
Implant, prepares the more stable nanometer silver dispersion pulp of dispersive property under ultrasound wave dispersion and mechanical agitation, is sunk with uniform
Form sediment nano silver powder is prepared with the method that high temperature thermal decomposition combines.
The preferred embodiment of the present invention described in detail above.It should be appreciated that one of ordinary skill in the art without
Need creative work just can make many modifications and variations with design of the invention.Therefore, all technologies in the art
Personnel are available by logical analysis, reasoning, or a limited experiment on the basis of existing technology under this invention's idea
Technical scheme, all should be in the protection domain being defined in the patent claims.
Claims (9)
1. a kind of sterilization of replaceable cartridge removes wet mask, including mask body (1) and ear-hang (2), it is characterised in that：The mouth
Cover body (1) includes ventilative cotton layer (3) and degerming layer (4)；Ventilative cotton layer (3) and degerming layer (4) are connected by slide fastener (5)
Connect, between ventilative cotton layer (3) and degerming layer (4), be provided with several interlayers (6), formed between the adjacent interlayer (6)
The space of filter element can be accommodated；Bag container (7), bag container (7) are provided between ventilative cotton layer (3) and degerming layer (4)
In be placed with water-absorbing resin bag；
Degerming layer (4) are bonded with rare earth, nanometer silver, Graphene and nanometer mineral matters, wherein acryloyl by acrylamide
Amine is 10 parts, and rare earth is 5 parts, nanometer silver is 2 parts, Graphene is 10 parts, and nanometer mineral matters are 2 parts.
2. a kind of sterilization of replaceable cartridge as claimed in claim 1 removes wet mask, it is characterized in that：Mask body (1)
On be provided with the catch (8) that can cover the slide fastener (4).
3. a kind of sterilization of replaceable cartridge as claimed in claim 1 removes wet mask, it is characterized in that：Degerming layer (4) are
Non-woven fabrics.
4. a kind of sterilization of replaceable cartridge as claimed in claim 1 removes wet mask, it is characterized in that：It is described be bonded with rare earth,
The degerming layer (4) of nanometer silver, Graphene and nanometer mineral matters is through microwave heating method process.
5. a kind of sterilization of replaceable cartridge as claimed in claim 1 removes wet mask, it is characterized in that：It is described be bonded with rare earth,
The degerming layer (4) of nanometer silver, Graphene and nanometer mineral matters is processed through ultrasonic reducing process.
6. a kind of sterilization of replaceable cartridge as claimed in claim 1 removes wet mask, it is characterized in that：It is described be bonded with rare earth,
The degerming layer (4) of nanometer silver, Graphene and nanometer mineral matters is through the process of light quantum reducing process.
7. a kind of sterilization of replaceable cartridge as claimed in claim 1 removes wet mask, it is characterized in that：It is described be bonded with rare earth,
The degerming layer (4) of nanometer silver, Graphene and nanometer mineral matters is through electrochemical reducing process.
8. a kind of sterilization of replaceable cartridge as claimed in claim 1 removes wet mask, it is characterized in that：The nanometer mineral matters are
Stone needle.
9. a kind of sterilization of replaceable cartridge as claimed in claim 1 removes wet mask, it is characterized in that：The nanometer silver is by following
Method is prepared：
The concentration of silver nitrate solution is 0.05mol/l, and PH=7, sintering temperature are 300 DEG C, and sintering 2h obtains mean diameter and is
The ball-type powder body of 50nm, when nanometer silver powder content is in 9 μ g/ml, to the killing rate of colibacillary staphylococcus aureuses be
100%, with ethyl acetate as disperse medium, when pH=6, shear rate 6000r/min, shear time 24h, addition slurry is filled out
Thing is filled, and the more stable nanometer silver dispersion pulp of dispersive property is prepared under ultrasound wave dispersion and mechanical agitation, is used homogeneous precipitation
Nano silver powder is prepared with the method that high temperature thermal decomposition combines.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611089407.1A CN106510049A (en) | 2016-12-01 | 2016-12-01 | Sterilization and dehumidification mask with high filter element replaceability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611089407.1A CN106510049A (en) | 2016-12-01 | 2016-12-01 | Sterilization and dehumidification mask with high filter element replaceability |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106510049A true CN106510049A (en) | 2017-03-22 |
Family
ID=58354676
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611089407.1A Withdrawn CN106510049A (en) | 2016-12-01 | 2016-12-01 | Sterilization and dehumidification mask with high filter element replaceability |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106510049A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2594302A (en) * | 2020-04-22 | 2021-10-27 | Michael Mennie Trevor | Filter element for personal protective equipment |
| JP7334039B2 (en) | 2018-12-28 | 2023-08-28 | 小林製薬株式会社 | mask |
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| US4856509A (en) * | 1985-07-08 | 1989-08-15 | Lemelson Jerome H | Face mask and method |
| CN202738865U (en) * | 2012-09-20 | 2013-02-20 | 陆文革 | Medical protection mask |
| CN203692606U (en) * | 2014-01-06 | 2014-07-09 | 美佳德科技（无锡）有限公司 | Haze prevention cup type mouth mask |
| CN203709321U (en) * | 2014-01-23 | 2014-07-16 | 华绣科技有限公司 | Haze-preventive antimicrobial mask |
| CN204015176U (en) * | 2014-03-12 | 2014-12-17 | 焦作伴侣纳米材料工程有限公司 | A kind of mouth mask |
| CN204091061U (en) * | 2014-07-03 | 2015-01-14 | 四川创越炭材料有限公司 | A kind of composite active carbon fibre elastomer mouth mask |
| CN104585922A (en) * | 2014-12-31 | 2015-05-06 | 戈家胜 | Multi-functional respirator |
| US20150314148A1 (en) * | 2013-09-04 | 2015-11-05 | Waterford Mask Systems Inc. | Facemask With Filter Insert For Protection Against Airborne Pathogens |
| CN204812203U (en) * | 2015-07-17 | 2015-12-02 | 新乡市康贝尔医疗科技有限公司 | Medical surgery gauze mask |
| CN204969589U (en) * | 2015-05-22 | 2016-01-20 | 天津全民科技有限公司 | Novel dustproof mask |
| CN105266238A (en) * | 2015-11-25 | 2016-01-27 | 常州纳美生物科技有限公司 | Anti-haze green mouth mask based on oxidized graphene and manufacturing method |
| CN105887474A (en) * | 2016-06-07 | 2016-08-24 | 北京中船经济技术开发有限公司 | Graphene purification and sterilization cloth |
| CN105996230A (en) * | 2016-07-26 | 2016-10-12 | 苏州艾美医疗用品有限公司 | Super-high-moisture-absorption-and-filtration medical protective mask |
-
2016
- 2016-12-01 CN CN201611089407.1A patent/CN106510049A/en not_active Withdrawn
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4856509A (en) * | 1985-07-08 | 1989-08-15 | Lemelson Jerome H | Face mask and method |
| CN202738865U (en) * | 2012-09-20 | 2013-02-20 | 陆文革 | Medical protection mask |
| US20150314148A1 (en) * | 2013-09-04 | 2015-11-05 | Waterford Mask Systems Inc. | Facemask With Filter Insert For Protection Against Airborne Pathogens |
| CN203692606U (en) * | 2014-01-06 | 2014-07-09 | 美佳德科技（无锡）有限公司 | Haze prevention cup type mouth mask |
| CN203709321U (en) * | 2014-01-23 | 2014-07-16 | 华绣科技有限公司 | Haze-preventive antimicrobial mask |
| CN204015176U (en) * | 2014-03-12 | 2014-12-17 | 焦作伴侣纳米材料工程有限公司 | A kind of mouth mask |
| CN204091061U (en) * | 2014-07-03 | 2015-01-14 | 四川创越炭材料有限公司 | A kind of composite active carbon fibre elastomer mouth mask |
| CN104585922A (en) * | 2014-12-31 | 2015-05-06 | 戈家胜 | Multi-functional respirator |
| CN204969589U (en) * | 2015-05-22 | 2016-01-20 | 天津全民科技有限公司 | Novel dustproof mask |
| CN204812203U (en) * | 2015-07-17 | 2015-12-02 | 新乡市康贝尔医疗科技有限公司 | Medical surgery gauze mask |
| CN105266238A (en) * | 2015-11-25 | 2016-01-27 | 常州纳美生物科技有限公司 | Anti-haze green mouth mask based on oxidized graphene and manufacturing method |
| CN105887474A (en) * | 2016-06-07 | 2016-08-24 | 北京中船经济技术开发有限公司 | Graphene purification and sterilization cloth |
| CN105996230A (en) * | 2016-07-26 | 2016-10-12 | 苏州艾美医疗用品有限公司 | Super-high-moisture-absorption-and-filtration medical protective mask |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7334039B2 (en) | 2018-12-28 | 2023-08-28 | 小林製薬株式会社 | mask |
| GB2594302A (en) * | 2020-04-22 | 2021-10-27 | Michael Mennie Trevor | Filter element for personal protective equipment |
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Effective date of registration: 20190628 Address after: 523808 Unit A1101, Eleventh Floor, Hong Long Yi Zhigu, 5 Xincheng Avenue, Songshan Lake High-tech Industrial Development Zone, Dongguan City, Guangdong Province Applicant after: GUANGDONG ZHONGCHUAN MILITARY AND CIVILIAN INTEGRATION RESEARCH INSTITUTE Co.,Ltd. Address before: 100081 No. 70 South College Road, Beijing, Haidian District Applicant before: BEIJING SHIPBUILDING ECONOMIC TECHNOLOGY DEVELOPMENT Co. Applicant before: Zhao Wenli Applicant before: Zhao Xuanyuan |
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