CN107928560A - A kind of exterior wall cleaning machine - Google Patents

A kind of exterior wall cleaning machine Download PDF

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Publication number
CN107928560A
CN107928560A CN201711132753.8A CN201711132753A CN107928560A CN 107928560 A CN107928560 A CN 107928560A CN 201711132753 A CN201711132753 A CN 201711132753A CN 107928560 A CN107928560 A CN 107928560A
Authority
CN
China
Prior art keywords
exterior wall
cleaning
cleaning machine
wall cleaning
roller
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
CN201711132753.8A
Other languages
Chinese (zh)
Inventor
朱俊华
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to CN201711132753.8A priority Critical patent/CN107928560A/en
Publication of CN107928560A publication Critical patent/CN107928560A/en
Pending legal-status Critical Current

Links

Classifications

    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47LDOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L11/00Machines for cleaning floors, carpets, furniture, walls, or wall coverings
    • A47L11/38Machines, specially adapted for cleaning walls, ceilings, roofs, or the like
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47LDOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L11/00Machines for cleaning floors, carpets, furniture, walls, or wall coverings
    • A47L11/40Parts or details of machines not provided for in groups A47L11/02 - A47L11/38, or not restricted to one of these groups, e.g. handles, arrangements of switches, skirts, buffers, levers
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47LDOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L11/00Machines for cleaning floors, carpets, furniture, walls, or wall coverings
    • A47L11/40Parts or details of machines not provided for in groups A47L11/02 - A47L11/38, or not restricted to one of these groups, e.g. handles, arrangements of switches, skirts, buffers, levers
    • A47L11/4013Contaminants collecting devices, i.e. hoppers, tanks or the like
    • A47L11/4016Contaminants collecting devices, i.e. hoppers, tanks or the like specially adapted for collecting fluids
    • A47L11/4022Contaminants collecting devices, i.e. hoppers, tanks or the like specially adapted for collecting fluids with means for recycling the dirty liquid
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47LDOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L11/00Machines for cleaning floors, carpets, furniture, walls, or wall coverings
    • A47L11/40Parts or details of machines not provided for in groups A47L11/02 - A47L11/38, or not restricted to one of these groups, e.g. handles, arrangements of switches, skirts, buffers, levers
    • A47L11/4036Parts or details of the surface treating tools
    • A47L11/4041Roll shaped surface treating tools
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47LDOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L11/00Machines for cleaning floors, carpets, furniture, walls, or wall coverings
    • A47L11/40Parts or details of machines not provided for in groups A47L11/02 - A47L11/38, or not restricted to one of these groups, e.g. handles, arrangements of switches, skirts, buffers, levers
    • A47L11/4036Parts or details of the surface treating tools
    • A47L11/4047Wound-up or endless cleaning belts
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47LDOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L11/00Machines for cleaning floors, carpets, furniture, walls, or wall coverings
    • A47L11/40Parts or details of machines not provided for in groups A47L11/02 - A47L11/38, or not restricted to one of these groups, e.g. handles, arrangements of switches, skirts, buffers, levers
    • A47L11/4063Driving means; Transmission means therefor
    • A47L11/4069Driving or transmission means for the cleaning tools
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04GSCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G23/00Working measures on existing buildings
    • E04G23/002Arrangements for cleaning building facades
    • E04G23/004Arrangements for cleaning building facades with arrangements for collecting waste water or cleaning products

Abstract

This application discloses a kind of exterior wall cleaning machine, including cleaning part, it is characterized in that, the exterior wall cleaning machine further includes tractive unit and the flexible rack for installing the cleaning part, the flexible rack realize the bending work of the exterior wall cleaning machine under the traction of the tractive unit.The present invention has the function of cleaning bending metope, can be suitable for various metopes, and keeping completing cleaning under conditions of cleaning structure is clean by structure design.

Description

A kind of exterior wall cleaning machine
Technical field
This application involves Cleaning for Outer Wall of Building field of mechanical technique, more particularly to a kind of exterior wall cleaning machine.
Background technology
At present, the washing and cleaning operation of Cleaning for Outer Wall of Building relies primarily on the instruments such as platform sling, hanging basket and hangs on operating personnel The mode in high-altitude is manually cleaned, but manually washing and cleaning operation cleaning efficiency is low and there are security risk.To solve manually cleaning Operation there are the problem of, provide a kind of exterior wall cleaning machine in the prior art, it is possible to achieve external wall cleaning machinery be turned into Industry.Specifically, No. 201210417643.7 patent discloses a kind of high building exterior wall cleaning machine, which passes through installed in clear The lifting assembly set on rolling brush washing cylinder, frame upper end face on washing lotion water tank, realizes the washing and cleaning operation of exterior wall, but for curved Bent metope and due to windowsill partition metope, due to above-mentioned high-wall cleaning machine can not buckling work, existing cleaning machine can not be right It, which carries out cleaning, causes to be only capable of manual work for these metopes.
The content of the invention
In order to solve the above technical problems, object of the present invention is to provide a kind of exterior wall cleaning machine, by structure design, Bending metope can be cleaned and the metope due to windowsill partition ensures the high cleanliness of exterior wall at the same time.
Technical solution provided by the invention is as follows:
A kind of exterior wall cleaning machine, including cleaning part, it is characterised in that the exterior wall cleaning machine further includes tractive unit and use In the flexible rack for installing the cleaning part, the flexible rack realizes that the exterior wall is clear under the traction of the tractive unit The bending work of washing machine.
Preferably, the tractive unit includes soft wheel, gear, conveyer belt and driving device, the flexible bottom of the frame For outer inclined-plane, the gear is arranged at the flexible bottom of the frame, and the soft wheel is arranged at the flexible rack both sides, The soft wheel and the gear are used to drive the gear in the outer inclined-plane row by transmitting band connection, the driving device Walk.
Preferably, the flexible rack includes two or more installing components, the adjacent installing component it Between connected by elastomeric element.
Preferably, the cleaning part includes the first cleaning roller and the second cleaning roller, the first cleaning roller and institute The direction of rotation for stating the second cleaning roller is vertical.
Preferably, the cleaning part further includes windshield wiper blade, combs bar and detergent line, the windshield wiper blade and combing bar and the One cleaning roller and the second cleaning cylinder contact.
Preferably, the exterior wall cleaning machine further includes wipe-drying device, and the wipe-drying device includes the transmission rod being vertically arranged, Cleaning band, cleaning band shuttling movement under the drive of transmission rod are arranged with the transmission rod.
Preferably, windshield wiper blade is provided with the wipe-drying device rear portion, combs bar, detergent line, the windshield wiper blade and comb Reason bar is contacted with the wipe-drying device.
Preferably, the described first cleaning roller and the second cleaning roller are provided with sewage treatment tank, the sewage disposal Groove is used to store the sewage flowed down from the described first cleaning roller and the second cleaning roller.
Preferably, the sewage disposal trench bottom is provided with partition plate, and the partition plate and the sewage disposal trench bottom are nothing Seam connection, the partition plate is with the sewage disposal groove sidewall to be seamlessly connected, and the height of the partition plate is less than sewage treatment tank Highly.
Preferably, the exterior wall cleaning machine further includes wirerope, two or more steel pipes, and the wirerope is sleeved on institute State on steel pipe, the steel pipe crosses spring connection, and the steel pipe is arranged at the both sides of the flexible rack.
The present invention provides a kind of exterior wall cleaning machine, including cleaning part, tractive unit and for installing the cleaning part Flexible rack, the flexible rack realize the bending work of the exterior wall cleaning machine under the traction of the tractive unit.It is logical Said structure is crossed, the exterior wall cleaning machine can clean bending metope with buckling work.
Brief description of the drawings
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, below will be to embodiment or existing There is attached drawing needed in technology description to be briefly described, it should be apparent that, drawings in the following description are only this Some embodiments described in application, for those of ordinary skill in the art, without creative efforts, Other attached drawings can also be obtained according to these attached drawings.
Fig. 1 is exterior wall cleaning machine positive structure diagram of the embodiment of the present invention
Fig. 2 is exterior wall cleaning machine backsight structural representation of the embodiment of the present invention
Fig. 3 is exterior wall cleaning machine side structure schematic view of the embodiment of the present invention
Fig. 4 cleans roller frame schematic diagram for exterior wall cleaning machine of the embodiment of the present invention first
Fig. 5 cleans roller frame schematic diagram for exterior wall cleaning machine of the embodiment of the present invention second
Fig. 6 is exterior wall cleaning machine wipe-drying device structure diagram of the embodiment of the present invention
Embodiment
It is in order to make those skilled in the art better understand the technical solutions in the application, real below in conjunction with the application The attached drawing in example is applied, the technical solution in the embodiment of the present application is clearly and completely described, it is clear that described implementation Example is merely a part but not all of the embodiments of the present application.It is common based on the embodiment in the application, this area Technical staff's all other embodiments obtained without making creative work, should all belong to the application protection Scope.
Embodiment
An embodiment of the present invention provides a kind of exterior wall cleaning machine, including cleaning part, tractive unit and for installing cleaning part Flexible rack 1, flexible rack 1 realizes the bending work of the exterior wall cleaning machine under the traction of the tractive unit. In the embodiment of the present invention, exterior wall cleaning machine is front portion close to the one side of wall, and the one side away from wall is rear portion.
Above-mentioned tractive unit includes soft wheel 16, gear 9, conveyer belt 7 and driving device, above-mentioned flexible 1 bottom of rack Outer inclined-plane, gear 9 are arranged at flexible 1 bottom of rack, and soft wheel 16 is arranged at flexible 1 both sides of rack, soft wheel 16 and tooth Wheel 9 is connected by conveyer belt 7, and outer inclined-plane of the driving device drive gear 9 in flexible 1 bottom of rack is walked.Gear 9 is in bendable The outer inclined-plane of bent bottom of the frame is walked upwards, and driving device gives flexible 1 external force of rack by conveyer belt 7 and soft wheel 9, makes It posteriorly bends.It is above-mentioned it is soft wheel 16 can be PVC it is soft wheel or the soft wheel of artificial rubber,
Above-mentioned driving device includes motor 17, belt pulley 11, steel cable 18 and transmission shaft, and motor 17 is placed in ground steel cable 18 Belt pulley 11 is connected, the transmission shaft connection gear 9 of belt pulley 11, when motor 17 is opened, motor 17 drives skin by steel cable 18 Belt wheel 11 works, and belt pulley 11 is walked upwards by being driven shaft driven gear 9 in the outer inclined-plane of flexible bottom of the frame, driving dress Put and give flexible 1 external force of rack by conveyer belt 7 and soft wheel 9, it is posteriorly bent.
Flexible rack 1 includes two or more parts, is connected between each part by elastomeric element Connect.Above-mentioned elastomeric element can be spring.Each part of flexible cleaning device is both provided with two or more
Above-mentioned cleaning part includes the first cleaning cleaning of roller 3 and second rolling 4, the first cleaning roller 3 and described second It is vertical to clean 4 direction of rotation of roller.First cleaning rolling 3 first carries out metope first time cleaning, and the second cleaning roller 4 is again to metope Carry out second to clean, second cleaning roller 4 tests to the first cleaning work of roller 3, the cleaning roller 3 of cleaning first Do not clean up part, and the direction of rotation of the second cleaning roller 4 cleaned with first roller direction of rotation it is vertical, will not be because of The limitation of rotation direction and produce cleaning dead angle.
Above-mentioned cleaning part further includes windshield wiper blade 7, combs bar 6 and detergent line 10, the windshield wiper blade 7 and combing bar 6 and the One cleaning roller 3 and second cleans roller 4 and contacts.Bar 6 carries out combing impurities removal, windshield wiper blade 7 hangs dry sewage, detergent line 10 for combing The first cleaning cleaning of roller 3 and second rolling 4 is sprayed, so as to fulfill the self-cleaning of cleaning part.
Above-mentioned exterior wall cleaning machine further includes wipe-drying device 5, and the wipe-drying device 5 includes the transmission rod being vertically arranged, described Cleaning band, cleaning band shuttling movement under the drive of transmission rod are arranged with transmission rod.Wipe-drying device is clear twice to process Metope after washing is examined again, and is responsible for wiping the moisture of metope attachment, metope is reached high level of cleanliness effect, is substituted people completely Work industry.
Windshield wiper blade 7 is provided with above-mentioned 5 front portion of wipe-drying device, combs bar 6, detergent line 10, the windshield wiper blade 7 and combing Bar 6 and the wipe-drying device 5.Bar 6 carries out combing impurities removal, windshield wiper blade 7 hangs dry sewage for combing, detergent line 10 carries out cleaning band Spray, so as to fulfill the self-cleaning of wipe-drying device 5.
Roller 4 is cleaned in the above-mentioned first cleaning roller 3 and second and is provided with sewage treatment tank, and sewage treatment tank is placed in cleaning The lower section of roller, the sewage treatment tank are used to store the dirt flowed down from the described first cleaning roller and the second cleaning roller Water.
Above-mentioned sewage disposal trench bottom is provided with partition plate, and the partition plate is seamless connection with the sewage disposal trench bottom, For the partition plate with the sewage disposal groove sidewall to be seamlessly connected, the height of the partition plate is less than the height of sewage treatment tank, from And the cavity for alloing sewage treatment tank to be formed with partition plate retains the residue in sewage.
Above-mentioned exterior wall cleaning machine further includes wirerope 13, two or more steel pipes 14, and the wirerope 13 is sleeved on institute State on steel pipe 14, the steel pipe 14 is crossed spring 15 and connected, and the steel pipe 14 is arranged at the both sides of the flexible rack 1.So as to Ensure that exterior wall cleaning machine is constant relative to the distance of metope, so as to fulfill more preferable cleaning effect.
Above-mentioned exterior wall cleaning machine further includes sewage-treatment plant, and sewage-treatment plant includes Water Tank, purification pot and clear water Tank, sewage flow into purification pot after Water Tank precipitates, flow into clean water tank after purification pot purification, realize recycling for water.
Water fender 12 is correspondingly arranged on the outside of above-mentioned first cleaning roller, prevents sewage from flashing.
The above-mentioned top of cabinet 1 is provided with camera 2.Video can be cleaned by real-time Transmission in operation bench screen, monitors wall Face cleaning process and cleannes, are cleaned, are farthest improved again for cleaning metope clean not yet by three-wheel The cleannes of metope.
Above-mentioned exterior wall cleaning machine further includes pulling apparatus 8, and wirerope 13 drives exterior wall cleaning machine under the lifting of pulling apparatus Move up and down.
Above-mentioned exterior wall cleaning machine can more parallel connections, improve service efficiency.
The foregoing description of the disclosed embodiments, enables professional and technical personnel in the field to realize or use the present invention. A variety of modifications to these embodiments will be apparent for those skilled in the art, as defined herein General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, it is of the invention The embodiments shown herein is not intended to be limited to, and is to fit to and the principles and novel features disclosed herein phase one The most wide scope caused.

Claims (10)

1. a kind of exterior wall cleaning machine, including cleaning part, it is characterised in that the exterior wall cleaning machine further includes tractive unit and is used for The flexible rack of the cleaning part is installed, the flexible rack realizes the outside Wall Cleaning under the traction of the tractive unit The bending work of machine.
2. exterior wall cleaning machine as claimed in claim 1, it is characterised in that the tractive unit includes soft wheel, gear, conveyer belt With driving device, the flexible bottom of the frame is outer inclined-plane, and the gear is arranged at the flexible bottom of the frame, described soft Matter wheel is arranged at the flexible rack both sides, and the soft wheel and the gear are by transmitting band connection, the driving device For driving the gear to walk in the outer inclined-plane.
3. exterior wall cleaning machine as claimed in claim 1, it is characterised in that the flexible rack includes two or more Installing component, connected by elastomeric element between the adjacent installing component.
4. exterior wall cleaning machine as claimed in claim 1, it is characterised in that the cleaning part includes the first cleaning roller and second Roller is cleaned, the direction of rotation that the first cleaning roller and described second clean roller is vertical.
5. exterior wall cleaning machine as claimed in claim 4, it is characterised in that the cleaning part further include windshield wiper blade, comb bar with Detergent line, the windshield wiper blade and combing bar and the described first cleaning roller and the second cleaning cylinder contact.
6. exterior wall cleaning machine as claimed in claim 1, it is characterised in that the exterior wall cleaning machine further includes wipe-drying device, institute The transmission rod that wipe-drying device includes being vertically arranged is stated, cleaning band is arranged with the transmission rod, the cleaning band is in transmission rod Drive lower shuttling movement.
7. exterior wall cleaning machine as claimed in claim 6, it is characterised in that further include windshield wiper blade, combing in the wipe-drying device Bar and detergent line, the windshield wiper blade and combing bar are contacted with the wipe-drying device.
8. exterior wall cleaning machine as claimed in claim 4, it is characterised in that in the described first cleaning roller and the second cleaning roller Correspondence position is provided with sewage treatment tank, and the sewage treatment tank is used to storing from the described first cleaning roller and described second clear Wash the sewage that roller flows down.
9. exterior wall cleaning machine as claimed in claim 8, it is characterised in that the sewage disposal trench bottom is provided with partition plate, institute Partition plate is stated with the sewage disposal trench bottom to be seamlessly connected, the partition plate is to be seamlessly connected with the sewage disposal groove sidewall, The height of the partition plate is less than the height of sewage treatment tank.
10. the exterior wall cleaning machine as described in claim 1-9 any one, it is characterised in that the exterior wall cleaning machine further includes Wirerope, two or more steel pipes, the wirerope are sleeved on the steel pipe, and the steel pipe crosses spring connection, the steel Pipe is arranged at the both sides of the flexible rack.
CN201711132753.8A 2017-11-15 2017-11-15 A kind of exterior wall cleaning machine Pending CN107928560A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201711132753.8A CN107928560A (en) 2017-11-15 2017-11-15 A kind of exterior wall cleaning machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201711132753.8A CN107928560A (en) 2017-11-15 2017-11-15 A kind of exterior wall cleaning machine

Publications (1)

Publication Number Publication Date
CN107928560A true CN107928560A (en) 2018-04-20

Family

ID=61932390

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201711132753.8A Pending CN107928560A (en) 2017-11-15 2017-11-15 A kind of exterior wall cleaning machine

Country Status (1)

Country Link
CN (1) CN107928560A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110432817A (en) * 2019-09-19 2019-11-12 象山泛海环保科技有限责任公司 A kind of cleaning device for tempered glass outside office tower room
CN110984606A (en) * 2019-12-17 2020-04-10 俞玲燕 Building cleaning device

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101589936A (en) * 2009-05-29 2009-12-02 宋树建 A kind of full automatic glass curtain wall cleaning machine
CN102133079A (en) * 2011-03-30 2011-07-27 安徽理工大学 Floor cleaner
CN202741380U (en) * 2012-09-03 2013-02-20 杭州二棉纱线有限公司 Spinning rubber roller cleaning machine
CN202960388U (en) * 2012-11-23 2013-06-05 林清吉 Automatic cleaning device
CN103251357A (en) * 2013-04-18 2013-08-21 三一汽车起重机械有限公司 Outer wall cleaning machine
CN203263303U (en) * 2013-05-23 2013-11-06 林清吉 Electric sweeping and washing device
US8813303B1 (en) * 2013-08-28 2014-08-26 Ecoppia Scientific, Ltd. Descent control and energy recovery system for solar panel cleaning system
CN203974987U (en) * 2014-05-28 2014-12-03 苏州工业园区职业技术学院 A kind of multi-track for climbing robot is taken turns trapezoidal crawler belt
CN206069557U (en) * 2016-09-08 2017-04-05 西北民族大学 Sewage treatment tank
CN106667383A (en) * 2016-12-30 2017-05-17 肇庆市小凡人科技有限公司 Climbing driving device of glass curtain wall cleaning robot

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101589936A (en) * 2009-05-29 2009-12-02 宋树建 A kind of full automatic glass curtain wall cleaning machine
CN102133079A (en) * 2011-03-30 2011-07-27 安徽理工大学 Floor cleaner
CN202741380U (en) * 2012-09-03 2013-02-20 杭州二棉纱线有限公司 Spinning rubber roller cleaning machine
CN202960388U (en) * 2012-11-23 2013-06-05 林清吉 Automatic cleaning device
CN103251357A (en) * 2013-04-18 2013-08-21 三一汽车起重机械有限公司 Outer wall cleaning machine
CN203263303U (en) * 2013-05-23 2013-11-06 林清吉 Electric sweeping and washing device
US8813303B1 (en) * 2013-08-28 2014-08-26 Ecoppia Scientific, Ltd. Descent control and energy recovery system for solar panel cleaning system
CN203974987U (en) * 2014-05-28 2014-12-03 苏州工业园区职业技术学院 A kind of multi-track for climbing robot is taken turns trapezoidal crawler belt
CN206069557U (en) * 2016-09-08 2017-04-05 西北民族大学 Sewage treatment tank
CN106667383A (en) * 2016-12-30 2017-05-17 肇庆市小凡人科技有限公司 Climbing driving device of glass curtain wall cleaning robot

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110432817A (en) * 2019-09-19 2019-11-12 象山泛海环保科技有限责任公司 A kind of cleaning device for tempered glass outside office tower room
CN110432817B (en) * 2019-09-19 2021-02-02 广东天宏玻璃科技有限公司 Cleaning device for high-rise office building outdoor tempered glass
CN110984606A (en) * 2019-12-17 2020-04-10 俞玲燕 Building cleaning device

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Application publication date: 20180420

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