CN109605195A - Damper rust removal - Google Patents

Damper rust removal Download PDF

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Publication number
CN109605195A
CN109605195A CN201811645515.1A CN201811645515A CN109605195A CN 109605195 A CN109605195 A CN 109605195A CN 201811645515 A CN201811645515 A CN 201811645515A CN 109605195 A CN109605195 A CN 109605195A
Authority
CN
China
Prior art keywords
sleeve
damper
rust removal
rust
power
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
CN201811645515.1A
Other languages
Chinese (zh)
Inventor
刘亚民
胡文东
范学军
詹新明
李祥
秦艳军
姜艳峰
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.)
Handan Power Supply Branch Hebei Electric Power Co Ltd
State Grid Corp of China SGCC
State Grid Hebei Electric Power Co Ltd
Original Assignee
Handan Power Supply Branch Hebei Electric Power Co Ltd
State Grid Corp of China SGCC
State Grid Hebei Electric Power 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 Handan Power Supply Branch Hebei Electric Power Co Ltd, State Grid Corp of China SGCC, State Grid Hebei Electric Power Co Ltd filed Critical Handan Power Supply Branch Hebei Electric Power Co Ltd
Priority to CN201811645515.1A priority Critical patent/CN109605195A/en
Publication of CN109605195A publication Critical patent/CN109605195A/en
Pending legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B27/00Other grinding machines or devices
    • B24B27/033Other grinding machines or devices for grinding a surface for cleaning purposes, e.g. for descaling or for grinding off flaws in the surface
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B55/00Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
    • B24B55/06Dust extraction equipment on grinding or polishing machines

Abstract

The present invention provides a kind of damper rust removals, belong to electrical equipment technical field, including first sleeve, second sleeve, power mechanism and operating stick;Second sleeve is snug fit in first sleeve, and the inner wall of second sleeve is equipped with multiple lug bosses;Power mechanism and second sleeve are sequentially connected;Operating stick is fixed at one end of first sleeve, damper rust removal provided by the invention, setting second sleeve is snug fit in first sleeve, and multiple lug bosses are set in the inside of second sleeve, staff's hand-held bar when use, by first sleeve with one end be directed at one end of damper, then start power mechanism, move back and forth second sleeve, and the iron rust on damper outer surface is disposed using multiple lug bosses, this mode only needs staff's hand-held bar, it is moved back and forth without manually controlling the damper rust removal, improve the stability of work, reduce the security risk of work.

Description

Damper rust removal
Technical field
The invention belongs to electrical equipment technical fields, are to be related to a kind of damper rust removal more specifically.
Background technique
It is assembled with a large amount of damper on every high-altitude transmission line of electricity at this stage, damper generallys use irony.With The growth of high-altitude transmission line of electricity runing time, the surface of many dampers have all been got rusty, in order to guarantee damper safety and stability Ground operation, needs in time to derust to the damper to get rusty, anti-corrosion.Staff needs to stand when derusting to damper at present On electric power line steel tower, holds the tools such as derusting road and derust to damper, this working method needs staff to tilt standing In on electric power pylon, having some potential safety problems and risk.
Summary of the invention
The purpose of the present invention is to provide a kind of damper rust removal, to solve existing in the prior art to remove damper The work of rust there is technical issues that compared with high safety.
To achieve the above object, the technical solution adopted by the present invention is that: a kind of damper rust removal is provided, comprising:
First sleeve;
Second sleeve is snug fit in the first sleeve, and the inner wall of the second sleeve is equipped with multiple for going Except the lug boss of one end outer surface iron rust of damper;
Power mechanism is fixed in the first sleeve, and is sequentially connected with the second sleeve, described for controlling Second sleeve moves back and forth;
Operating stick is fixed at one end of the first sleeve.
Further, the lateral surface of the second sleeve is equipped with the guide part that protrudes outward, the first sleeve it is interior Wall is equipped with the guide groove being slidably matched with the guide part.
Further, it is additionally provided on the inner wall of the second sleeve multiple for accommodating the receiving slot of iron rust, each appearance Put the downside that slot is set to the second sleeve inner wall.
Further, it is described receiving slot bottom surface be equipped with multiple first through hole, the first sleeve be equipped with it is multiple with it is each Corresponding second through-hole of the first through hole.
Further, one end of first sleeve extension with outward extension, the power mechanism are set to described On extension, the operating stick is fixed on the extension.
Further, the power mechanism includes:
Motor is fixed on the extension;
Turntable is set on the extension, and connect with the motor drive;
Connecting rod, one end are articulated with the second sleeve close to the side of the extension, and the other end and the turntable are eccentric Hingedly.
Further, the damper rust removal further include:
Supporting block, the side set on the first sleeve far from the power mechanism, and set with the first sleeve interval It sets, is used to support the other end of the damper;
Baffle, one end set on the supporting block far from the first sleeve, the other end of the damper are resisted against institute It states on baffle;
It is connected between the supporting block and the first sleeve by connecting plate.
Further, the upper surface of the supporting block is recessed arc surface, and the arc surface is another with the damper The cooperation of one end lateral surface.
Further, the damper rust removal further include:
Controller, one end set on the operating stick far from the first sleeve, and be electrically connected with the power mechanism.
Further, the damper rust removal further include:
Hair dryer is fixed on the inner wall of the first sleeve, and is arranged towards the second sleeve, for blowing away State the iron rust under damper rust removal removes.
The beneficial effect of damper rust removal provided by the invention is: compared with prior art, damper of the present invention removes Become rusty device, and setting second sleeve is snug fit in first sleeve, and multiple lug bosses are arranged in the inside of second sleeve, uses When staff's hand-held bar, by first sleeve with one end be directed at one end of damper, then start power mechanism, make Two sleeves move back and forth, and are removed the iron rust on damper outer surface using the multiple lug bosses being located in second sleeve Fall, this mode only needs staff's hand-held bar, moves back and forth, improves without manually controlling the damper rust removal The stability of work, reduces the security risk of work.
Detailed description of the invention
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to embodiment or description of the prior art Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is only of the invention some Embodiment for those of ordinary skill in the art without creative efforts, can also be attached according to these Figure obtains other attached drawings.
Fig. 1 is the structural schematic diagram one of damper rust removal provided in an embodiment of the present invention;
Fig. 2 is the enlarged drawing in Fig. 1 at A;
Fig. 3 is the enlarged drawing in Fig. 1 at B;
Fig. 4 is the structural schematic diagram two of damper rust removal provided in an embodiment of the present invention.
Wherein, each appended drawing reference in figure:
1- first sleeve;11- guide groove;12- extension;2- second sleeve;21- lug boss;22- guide part;23- receiving Slot;231- first through hole;3- power mechanism;31- motor;32- turntable;33- connecting rod;4- operating stick;41- groove;5- supporting block; 51- arc surface;52- connecting plate;6- baffle;7- controller.
Specific embodiment
In order to which technical problems, technical solutions and advantages to be solved are more clearly understood, tie below Accompanying drawings and embodiments are closed, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only To explain the present invention, it is not intended to limit the present invention.
Fig. 1 and Fig. 4 are please referred to, now damper rust removal provided by the invention is illustrated.A kind of damper rust removal, Including first sleeve 1, second sleeve 2, power mechanism 3 and operating stick 4;Second sleeve 2 is snug fit in first sleeve 1, The inner wall of second sleeve 2 is equipped with multiple for removing the lug boss 21 of one end outer surface iron rust of damper;Power mechanism 3 is solid Surely it is set in first sleeve 1, and is sequentially connected with second sleeve 2, moved back and forth for controlling second sleeve 2;Operating stick 4 is fixed Set on one end of first sleeve 1.
Damper rust removal provided by the invention, compared with prior art, setting second sleeve 2 are snug fit at first set In cylinder 1, and multiple lug bosses 21 are set in the inside of second sleeve 2, staff's hand-held bar 4 when use, by first Sleeve 1 with one end be directed at one end of damper, then start power mechanism 3, move back and forth second sleeve 2, and use Multiple lug bosses 21 in second sleeve 2 dispose the iron rust on damper outer surface, and this mode only needs work people Member's hand-held bar 4 moves back and forth without manually controlling the damper rust removal, improves the stability of work, reduces The security risk of work.
Lug boss 21 can be to have cuspidated protrusion, and dense arrangement, or use multiple densely arranged short steel wires, real The iron rust on damper is removed with steel wire.Lug boss 21 can also be made to pass through second sleeve 2, and be pierced by the one of second sleeve 2 End is detachably connected with second sleeve 2 by bolt, realizes that adjusting lug boss 21 protrudes into the length in second sleeve 2, Lai Shiying The damper derusting work of different-diameter.
Fig. 1 and Fig. 2 are please referred to, as a kind of specific embodiment of damper rust removal provided by the invention, second set The lateral surface of cylinder 2 is equipped with the guide part 22 that protrudes outward, and the inner wall of first sleeve 1 is equipped with to be slidably matched with guide part 22 Guide groove 11, setting guide part 22 slides in guide groove 11, mobile when moving back and forth second sleeve 2 in first sleeve 1 Ground is more smoothly, and guide groove 11 plays the role of guiding, and second sleeve 2 is made to stablize, efficiently work.
Fig. 1 and Fig. 2 are please referred to, as a kind of specific embodiment of damper rust removal provided by the invention, second set Multiple receiving slots 23 for being used to accommodate iron rust are additionally provided on the inner wall of cylinder 2, each slot 23 that receives is set under 2 inner wall of second sleeve Multiple receiving slots 23 are arranged in side, are temporarily stored into the iron rust removed in receiving slot 23, avoid iron rust more and hinder second sleeve 2 Reciprocating motion, and by it is each receiving slot 23 be set to 2 inner wall of second sleeve downside, i.e., in the lower half circle of 2 inner wall of second sleeve, Iron rust is fallen within from top to bottom in each receiving slot 23.The length direction of each receiving slot 23 is consistent with the direction of motion of second sleeve 2, makes Iron rust is easier to fall into receiving slot 23.It should be noted that when element is referred to as " being fixed on " or " being set to " another yuan Part, it can be directly on the other element or indirectly on another element.It is known as and " connects when an element In " another element, it can be directly to another element or be indirectly connected on another element.
Fig. 1 and Fig. 2 are please referred to, as a kind of specific embodiment of damper rust removal provided by the invention, receives slot 23 bottom surface is equipped with multiple first through hole 231, and it is logical that first sleeve 1 is equipped with multiple corresponding with each first through hole 231 second Hole is arranged first through hole 231 in the bottom surface of receiving slot 23, and the second through-hole and first through hole 231 is arranged in first sleeve 1 It is corresponding, after entering iron rust in receiving slot 23, and it may pass through first through hole 231 and the second through-hole is discharged, this mode The damper rust removal is discharged in iron rust in time, damper rust removal is allow to continue, efficiently work.In addition, term " the One ", " second " is used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance or implicitly indicates and is indicated The quantity of technical characteristic." first " is defined as a result, the feature of " second " can explicitly or implicitly include one or more Multiple this feature.In the description of the present invention, the meaning of " plurality " is two or more, unless otherwise clearly specific limit It is fixed.
A kind of specific embodiment as damper rust removal provided by the invention referring to FIG. 1 to FIG. 4, first set One end extension 12 with outward extension of cylinder 1, power mechanism 3 are set on extension 12, and operating stick 4 is fixed at extension On 12, power mechanism 3 is set on extension 12, power mechanism 3 is made to avoid being mutually shifted for second sleeve 2 and first sleeve 1 Region prevents power mechanism 3 from interfering with second sleeve 2, while the length for reducing first sleeve 1 of this mode also as far as possible Degree, to achieve the purpose that mitigate 1 mass of first sleeve, operating stick 4 also is secured on extension 12, and power mechanism 3 is close to behaviour Make bar 4, being also convenient for staff, steadily hand-held bar 4 works.
A kind of specific embodiment as damper rust removal provided by the invention referring to FIG. 1 to FIG. 4, engine Structure 3 includes motor 31, turntable 32 and connecting rod 33, and motor 31 is fixed on extension 12;Turntable 32 is set on extension 12, And it is sequentially connected with motor 31;One end of connecting rod 33 is articulated with second sleeve 2 close to the side of extension 12, the other end and turntable 32 is eccentric hinged, and motor 31 drives turntable 32 to rotate, and keeps one end of connecting rod 33 and turntable 32 eccentric hinged, passes through this side Formula allows the second sleeve 2 connecting with 33 other end of connecting rod under the action of motor 31, turntable 32 and connecting rod 33, realizes Move back and forth, i.e., second sleeve 2 back and forth slidably reciprocates in first sleeve 1, and structure is simple, 33 structure service life of connecting rod also compared with It is long.Straight-bar can be set close to one end of power mechanism 3 in second sleeve 2, straight-bar and connecting rod 33 are hinged, protect second sleeve 2 not It is damaged.And keeps the axle level of turntable 32 consistent with the level height of straight-bar, back and forth transported convenient for driving second sleeve 2 It is dynamic.It is to be appreciated that term " length ", " width ", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outside" The orientation or positional relationship of equal instructions is to be based on the orientation or positional relationship shown in the drawings, be merely for convenience of the description present invention and Simplify description, rather than the device or element of indication or suggestion meaning must have a particular orientation, with specific orientation construction And operation, therefore be not considered as limiting the invention.
Fig. 1 and Fig. 4 are please referred to, as a kind of specific embodiment of damper rust removal provided by the invention, damper Rust removal further includes supporting block 5 and baffle 6, and supporting block 5 is set to side of the first sleeve 1 far from power mechanism 3, and and first set 1 interval setting of cylinder, is used to support the other end of damper;Baffle 6 is set to the one end of supporting block 5 far from first sleeve 1, damper The other end be resisted against on baffle 6;It is connected between supporting block 5 and first sleeve 1 by connecting plate 52, damper generally comprises two A symmetrically arranged tup, when the tup to one end derusts, by the tup of one end and second sleeve 2 far from operating stick 4 One end match installation, the tup of the other end is set in supporting block 5, and is resisted against on baffle 6, at work, work people Member is using certain power hand-held bar 4 and is pulled back, and is against the damper rust removal on the tup of the other end, stability is more It is high.Connecting plate 52 can be set as extension type, to adapt to different size of damper.It can be set as by supporting block 5 and baffle 6 Symmetrical structure, convenient for derusting respectively to two tups of damper respectively.Connecting plate 52 is set as the knot with concave surface Structure can collect iron rust.Magnet can be set on baffle 6, be adsorbed in the other end of damper on magnet, staff's work When then can be more laborsaving, also improve job stability.
Fig. 1 and Fig. 4 are please referred to, as a kind of specific embodiment of damper rust removal provided by the invention, supporting block 5 Upper surface be recessed arc surface 51, the other end lateral surface of arc surface 51 and damper cooperates, by the upper surface of supporting block 5 It is set as arc surface 51, is coupled the lateral surface of the other end of damper with arc surface 51, is connected between damper and supporting block 5 What is connect is more stable, and when staff's hand-held bar 4 works, the stability also held is higher.
Fig. 1 and Fig. 4 are please referred to, as a kind of specific embodiment of damper rust removal provided by the invention, damper Rust removal further includes controller 7, and controller 7 is set to the one end of operating stick 4 far from first sleeve 1, and electrically connects with power mechanism 3 Connect, by controller 7 be set to the one end of operating stick 4 far from first sleeve 1, convenient for staff hold the damper rust removal when Wait the working condition that power mechanism 3 is controlled by operation controller 7.Operating stick 4 can be set as to hollow stem, controller 7 and power The route that mechanism 3 connects is being arranged in hollow stem, while groove 41 being arranged in operating stick 4, and controller 7 is installed on groove In 41, it is convenient for staff's hand-held bar 4.
Fig. 1 and Fig. 4 are please referred to, as a kind of specific embodiment of damper rust removal provided by the invention, damper Rust removal further includes hair dryer, and hair dryer is fixed on the inner wall of first sleeve 1, and is arranged towards second sleeve 2, for blowing The iron rust under damper rust removal removes is walked, the lug boss 21 on 2 inner wall of second sleeve is clear by the iron rust on damper outer surface It after removing, can become scattered about in second sleeve 2, after accumulating more iron rust, it is necessary to which timing is cleared up, and can be dallied over one's work the time, is dropped Low cleaning efficiency is arranged hair dryer, so that the iron rust cleaned up is blown away in time under the wind blows of hair dryer, without leaving In in second sleeve 2.
The above is merely preferred embodiments of the present invention, be not intended to limit the invention, it is all in spirit of the invention and Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within principle.

Claims (10)

1. damper rust removal characterized by comprising
First sleeve;
Second sleeve is snug fit in the first sleeve, and the inner wall of the second sleeve is equipped with multiple anti-for removing The lug boss of one end outer surface iron rust of vibration hammer;
Power mechanism is fixed in the first sleeve, and is sequentially connected with the second sleeve, for controlling described second Sleeve moves back and forth;
Operating stick is fixed at one end of the first sleeve.
2. damper rust removal as described in claim 1, which is characterized in that the lateral surface of the second sleeve is equipped with outside The guide part protruded out, the inner wall of the first sleeve are equipped with the guide groove being slidably matched with the guide part.
3. damper rust removal as described in claim 1, which is characterized in that be additionally provided on the inner wall of the second sleeve multiple For accommodating the receiving slot of iron rust, each receiving slot is set to the downside of the second sleeve inner wall.
4. damper rust removal as claimed in claim 3, which is characterized in that it is logical that the bottom surface of the receiving slot is equipped with multiple first Hole, the first sleeve are equipped with multiple the second through-holes corresponding with each first through hole.
5. damper rust removal as described in claim 1, which is characterized in that one end of the first sleeve, which is equipped with, to extend outwardly Extension, the power mechanism be set to the extension on, the operating stick is fixed on the extension.
6. damper rust removal as claimed in claim 5, which is characterized in that the power mechanism includes:
Motor is fixed on the extension;
Turntable is set on the extension, and connect with the motor drive;
Connecting rod, one end are articulated with the second sleeve close to the side of the extension, and the other end and the turntable are eccentric hinged.
7. damper rust removal as described in claim 1, which is characterized in that the damper rust removal further include:
Supporting block, the side set on the first sleeve far from the power mechanism, and be arranged with the first sleeve interval, it uses In the other end for supporting the damper;
Baffle, one end set on the supporting block far from the first sleeve, the other end of the damper are resisted against the gear On plate;
It is connected between the supporting block and the first sleeve by connecting plate.
8. damper rust removal as claimed in claim 7, which is characterized in that the upper surface of the supporting block is recessed circular arc The other end lateral surface of face, the arc surface and the damper cooperates.
9. such as the described in any item damper rust removals of claim 1-8, which is characterized in that the damper rust removal also wraps It includes:
Controller, one end set on the operating stick far from the first sleeve, and be electrically connected with the power mechanism.
10. such as the described in any item damper rust removals of claim 1-8, which is characterized in that the damper rust removal also wraps It includes:
Hair dryer is fixed on the inner wall of the first sleeve, and is arranged towards the second sleeve, described anti-for blowing away Iron rust of the vibration hammer rust removal except under.
CN201811645515.1A 2018-12-30 2018-12-30 Damper rust removal Pending CN109605195A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201811645515.1A CN109605195A (en) 2018-12-30 2018-12-30 Damper rust removal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201811645515.1A CN109605195A (en) 2018-12-30 2018-12-30 Damper rust removal

Publications (1)

Publication Number Publication Date
CN109605195A true CN109605195A (en) 2019-04-12

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201811645515.1A Pending CN109605195A (en) 2018-12-30 2018-12-30 Damper rust removal

Country Status (1)

Country Link
CN (1) CN109605195A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111716206A (en) * 2020-06-11 2020-09-29 安徽省含山县兴建铸造厂 Remodeling and reconstruction process for rusty damper

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002072907A1 (en) * 2001-03-10 2002-09-19 Daimlerchrysler Ag Method and device for the production of coated bores
US20040248505A1 (en) * 2003-06-04 2004-12-09 Lung-Hui Chen Bi-directional rotation pneumatic grinding tool
CN102019573A (en) * 2010-10-12 2011-04-20 大连大显精密轴有限公司 Automatic polishing mechanism for windshield wiper balls
CN103144032A (en) * 2013-03-15 2013-06-12 江苏科技大学 Multifunctional surface treatment device
CN204221630U (en) * 2014-11-05 2015-03-25 长葛市神光建筑机械厂 A kind of discontinuous reinforcing bar rust cleaning mill tube
CN204748270U (en) * 2015-05-16 2015-11-11 长葛市锐菱机械厂 A steel bar derusting section of thick bamboo
CN205915162U (en) * 2016-08-27 2017-02-01 哈尔滨锅炉厂有限责任公司 Device suitable for cylindrical parts polishes on surface
CN106541321A (en) * 2016-11-24 2017-03-29 中国三冶集团有限公司 A kind of electronic derusting device of hand-held reducing reinforcing bar and its using method
CN106826512A (en) * 2017-02-21 2017-06-13 济南大学 A kind of bistrique moves back and forth polishing machine
CN207071853U (en) * 2017-08-05 2018-03-06 刘奇美 A kind of derusting device for building pipe lateral wall

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002072907A1 (en) * 2001-03-10 2002-09-19 Daimlerchrysler Ag Method and device for the production of coated bores
US20040248505A1 (en) * 2003-06-04 2004-12-09 Lung-Hui Chen Bi-directional rotation pneumatic grinding tool
CN102019573A (en) * 2010-10-12 2011-04-20 大连大显精密轴有限公司 Automatic polishing mechanism for windshield wiper balls
CN103144032A (en) * 2013-03-15 2013-06-12 江苏科技大学 Multifunctional surface treatment device
CN204221630U (en) * 2014-11-05 2015-03-25 长葛市神光建筑机械厂 A kind of discontinuous reinforcing bar rust cleaning mill tube
CN204748270U (en) * 2015-05-16 2015-11-11 长葛市锐菱机械厂 A steel bar derusting section of thick bamboo
CN205915162U (en) * 2016-08-27 2017-02-01 哈尔滨锅炉厂有限责任公司 Device suitable for cylindrical parts polishes on surface
CN106541321A (en) * 2016-11-24 2017-03-29 中国三冶集团有限公司 A kind of electronic derusting device of hand-held reducing reinforcing bar and its using method
CN106826512A (en) * 2017-02-21 2017-06-13 济南大学 A kind of bistrique moves back and forth polishing machine
CN207071853U (en) * 2017-08-05 2018-03-06 刘奇美 A kind of derusting device for building pipe lateral wall

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111716206A (en) * 2020-06-11 2020-09-29 安徽省含山县兴建铸造厂 Remodeling and reconstruction process for rusty damper

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Application publication date: 20190412