CN109026963A - Slot cover and slot cover extracting tool for fastener driver slot - Google Patents
Slot cover and slot cover extracting tool for fastener driver slot Download PDFInfo
- Publication number
- CN109026963A CN109026963A CN201810975565.XA CN201810975565A CN109026963A CN 109026963 A CN109026963 A CN 109026963A CN 201810975565 A CN201810975565 A CN 201810975565A CN 109026963 A CN109026963 A CN 109026963A
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- Prior art keywords
- slot
- slot cover
- hole
- circular base
- fastener driver
- 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.)
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- 238000005452 bending Methods 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 4
- 239000007769 metal material Substances 0.000 claims description 4
- 239000002131 composite material Substances 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 abstract description 10
- 238000000576 coating method Methods 0.000 abstract description 10
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 12
- 238000009434 installation Methods 0.000 description 5
- 239000011159 matrix material Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 1
- 235000011613 Pinus brutia Nutrition 0.000 description 1
- 241000018646 Pinus brutia Species 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B37/00—Nuts or like thread-engaging members
- F16B37/14—Cap nuts; Nut caps or bolt caps
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
- B25B27/14—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Surgical Instruments (AREA)
- Dental Prosthetics (AREA)
Abstract
The present invention relates to the slot covers and slot cover extracting tool for fastener driver slot.The fastener driver slot is interior hexagonal flower pattern slot structure, the slot cover includes circular base and outer-hexagonal flower type structure, the outer-hexagonal flower type structure of the slot cover and the interior hexagonal flower pattern slot structure of the fastener driver slot match, and the bottom surface of the circular base of the slot cover is plane.By designing the slot cover to match with the interior hexagonal flower pattern slot structure of fastener driver slot, the notch of fastener can be closed, so that the head of fastener is maintained on the same face with connected component, makes complete machine that there is good aeroperformance and stability, while convenient for coating invisible coating.In addition, slot cover extracting tool of the invention is easy to operate, reliable, so that the faster convenience of the dismounting of slot cover, will not damage slot cover, is conducive to reuse, reduces manufacturing cost.
Description
Technical field
The present invention relates to fastener application technical field, more particularly to for fastener driver slot slot cover and slot cover tear open
Unload tool.
Background technique
Fastener is to be fastenedly connected use and the extremely wide a kind of machine components of application range, but when fastener is answered
Special industry is used, its hardness, intensity, concealment, disassembly etc. are required high, the effect of aviation fasteners is by aircraft
Thousands of a components connections form a whole.Load, compatible deformation are transmitted in its diametrical direction when carrying.
Head is that the fastener of hexagonal flower pattern slot is increasingly used in aircaft configuration with its excellent twisting performance.
At the same time, type aircraft is also higher and higher to structure and surface aeroperformance and stealthy demand, the hexagonal flower pattern slot of fastener
Although solving the twisting requirement of installation and removal process, biggish grooved size is also to aircraft aerodynamic performance and Stealth Fighter
Produce influence.
Currently, with hexagonal flower pattern slot in type aircraft using more and more extensive, but for notch position after installation
Subsequent processing is not carried out, so that fastener notch is all in naked state.In this way can both shadow be generated to the aeroperformance of design
It rings, invisible coating can not be coated in notch, influence the performance of complete machine Stealth Fighter.
Therefore, the slot cover and slot cover extracting tool for fastener driver slot are inventor provided.
Summary of the invention
To solve the above problems, the embodiment of the invention provides slot covers and slot cover disassembly work for fastener driver slot
Tool is designed the slot cover to match with the interior hexagonal flower pattern slot structure of fastener driver slot by creative, can will be fastened
The notch of part is closed, and the head of fastener is enable to be maintained on the same face with connected component, has complete machine good pneumatic
Performance and stability, while convenient for coating invisible coating.
In a first aspect, the embodiment of the present invention proposes the slot cover for fastener driver slot, wherein fastener driver slot
For interior hexagonal flower pattern slot structure, slot cover of the invention is characterized in that, the slot cover includes circular base and outer-hexagonal flower pattern knot
Structure, the outer-hexagonal flower type structure of the slot cover and the interior hexagonal flower pattern slot structure of the fastener driver slot match, the slot
The bottom surface of the circular base of lid is plane.
Preferably, the diagonal length of the outer-hexagonal flower type structure is equal with the diameter of the circular base.
Preferably, the center of the outer-hexagonal flower type structure of the slot cover is provided with first through hole.
Preferably as the first embodiment, the center of the circular base of the slot cover is provided with the second through-hole, and described
One through-hole is coaxial with second through-hole and penetrates through, and the diameter of the first through hole is bigger than the diameter of second through-hole.
Preferably, the part that the first through hole intersects with the circular base is sloping platform terrace, the sloping platform terrace
Tilt angle is 15 ° ~ 45 °.
Preferably as second of embodiment, the center of the circular base of the slot cover is provided with rectangular shaped slot, and described
One through-hole and the rectangular shaped slot penetrate through, and the part that the first through hole intersects with the circular base is flat gripping surface.
Preferably, the circular base and the outer-hexagonal flower type structure are entity structure, and the circular base with
Both described outer-hexagonal flower type structures are integrally molded so as the slot cover of entity structure.
Preferably, the material of the slot cover is resinae composite material or metal material.
Second aspect, the embodiment of the present invention proposes a kind of slot cover extracting tool, for described in the first embodiment
The disassembly of slot cover, the extracting tool include the handle portion being folded to form by a metal strip and crawl section, and the handle portion is centre
The ring structure that bending part is formed, the crawl section are the elasticity folding knot formed by the outside bending in metal strip both ends
Structure, the elasticity opening-closing structure elasticity can open and close at the dog-ear at both ends, for logical by second on the circular base
Hole is protruded into the first through hole of the outer-hexagonal flower type structure, and the sloping platform terrace of the circular base is contacted and grab.
The third aspect, the embodiment of the present invention propose another slot cover extracting tool, for described in the first embodiment
Slot cover disassembly, which includes handle portion and crawl section, and the handle portion is circular ring structure, and the crawl section is one
The straight-bar portion of T-type structure, the T-type structure is connect with the handle portion of the ring structure, and the wide head of the T-type structure is used for
It is protruded by the rectangular shaped slot of the circular base in the first through hole of the outer-hexagonal flower type structure, contact and grabs the circle
The flat gripping surface of shape matrix.
To sum up, the slot cover and slot cover extracting tool proposed by the present invention for fastener driver slot, by devising and tightly
The slot cover that the driving slot structure of firmware matches, the outer-hexagonal flower type structure of slot cover and the interior hexagonal flower pattern slot structure of driver slot
With installation, make it have more reliable and excellent assembling, make body have good pneumatic property, slot cover by notch block without
Outside being exposed to, convenient for coating invisible coating on the surface of connection structural bodies, slot cover of the invention is reasonable in design, facilitates system
It makes, install and dismantles.In addition, slot cover extracting tool of the invention is easy to operate, reliable, so that the faster side of the dismounting of slot cover
Just, slot cover will not be damaged, is conducive to reuse, reduces manufacturing cost.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, will make below to required in the embodiment of the present invention
Attached drawing is briefly described, it should be apparent that, drawings described below is only some embodiments of the present invention, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 (a) is the interior hexagonal flower pattern slot structure schematic top plan view of fastener driver slot.
Fig. 1 (b) be in Fig. 1 (a) F-F to diagrammatic side-view cross-sectional schematic diagram.
Fig. 2 (a) is the A type groove lid schematic top plan view that the first is used for fastener driver slot.
Fig. 2 (b) is A type groove lid A-A to diagrammatic side-view cross-sectional schematic diagram.
Fig. 3 (a) is second of Type B slot cover schematic top plan view for being used for fastener driver slot.
Fig. 3 (b) is Type B slot cover B-B direction diagrammatic side-view cross-sectional schematic diagram.
Fig. 4 (a) is the C-shaped channel lid schematic top plan view that the third is used for fastener driver slot.
Fig. 4 (b) is C-shaped channel lid C-C to diagrammatic side-view cross-sectional schematic diagram.
Fig. 5 is a kind of slot cover extracting tool schematic diagram for A type groove lid.
Fig. 6 is a kind of slot cover extracting tool usage scenario schematic diagram for A type groove lid.
Fig. 7 is another slot cover extracting tool schematic diagram for being used for Type B slot cover.
In figure:
Hexagonal flower pattern slot structure in 1-；2- circular base；3- outer-hexagonal flower type structure；4- first through hole；The second through-hole of 5-；6- square
Shape slot；7- handle portion；The crawl section 8-.
Specific embodiment
Embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples.Following embodiment it is detailed
Thin description and attached drawing cannot be used to limit the scope of the invention for illustratively illustrating the principle of the present invention, i.e., of the invention
It is not limited to described embodiment, covers part, component and connection type under the premise of without departing from the spirit of the present invention
Any modification, replacement and improvement.
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.The application is described in detail below with reference to accompanying drawings and in conjunction with the embodiments.
Fig. 1 (a) and Fig. 1 (b) is the interior hexagonal flower pattern slot structure schematic diagram of fastener driver slot, and fastener driver slot is interior
Hexagonal flower pattern slot structure 1.Currently, this hexagonal flower pattern slot in type aircraft using more and more extensive, but for installation after
Notch position does not carry out subsequent processing, all in naked state.The aeroperformance of overall design can both be had an impact in this way,
Invisible coating can not be coated in notch, influence the performance of complete machine Stealth Fighter.Based on this general hexagonal flower pattern slot structure 1
Fastener, the invention proposes the slot cover of matched fastener driver slot and slot cover extracting tools.
Fig. 2, Fig. 3 and Fig. 4 are the embodiment schematic diagram of three kinds of structure type based on slot cover proposed by the present invention respectively.Base
It is interior hexagonal flower pattern slot structure 1 in fastener driver slot, slot cover of the invention includes circular base 2 and outer-hexagonal flower type structure
3, wherein the interior hexagonal flower pattern slot structure 1 of the outer-hexagonal flower type structure 3 with fastener driver slot of slot cover matches, the circle of slot cover
The bottom surface of matrix 2 is plane.In use, by interior 1 phase of hexagonal flower pattern slot structure of the outer-hexagonal flower type structure 3 of slot cover and fastener
Matching, match circular base 2 and the sinking step of driver slot on fastener, and height is quite, and guarantee slot cover can be with after installing
The upper surface of fastener is concordant, blocks to be used for the notch of driver slot of twisting installation, and can be in the plane of the slot cover
Matrix sprays invisible coating on face.
Preferably, the diagonal length of the outer-hexagonal flower type structure 3 of slot cover is equal with the diameter of circular base 2.Specific size
Matched design need to be carried out according to the structure size of driver slot.
As an implementation, as shown in Fig. 2 (a) and Fig. 2 (b), in the outer-hexagonal flower type structure 3 of A type groove lid
The heart is provided with first through hole 4.It is provided with the second through-hole 5 at the center of the circular base 2 of slot cover, first through hole 4 and the second through-hole 5 are same
Axis and the two is mutually communicated, the diameter of first through hole 4 is bigger than the diameter of the second through-hole 5.Also, in first through hole 4 and round base
The part that body 2 intersects is sloping platform terrace, and the inclination angle alpha of the sloping platform terrace is 15 ° ~ 45 °, and specific implementation is preferred angled angle
Spend inclined surface processing easy to produce and easy disassembly that α is 45 °.
As another embodiment, as shown in Fig. 3 (a) and Fig. 3 (b), in the outer-hexagonal flower type structure 3 of Type B slot cover
Center is equally provided with first through hole 4.Unlike, rectangular shaped slot 6, also, first are provided at the center of the circular base 2 of slot cover
Both through-hole 4 and rectangular shaped slot 6 are mutually communicated, and the part that first through hole 4 intersects with circular base 2 is flat gripping surface.
As the third embodiment, as shown in Fig. 4 (a) and Fig. 4 (b), unlike, in the outer-hexagonal flower of C-shaped channel lid
Hole is not opened at the center of type structure 3, also without aperture, the circular base 2 and outer-hexagonal of the C-shaped channel lid on circular base 2
Flower type structure 3 is entity structure, and the two is to be integrally molded so as the slot cover of entity structure.
Preferably, either the slot cover of which kind of structure type, slot cover material of the invention can select resinae compound
It is prepared by material or metal material.The complexity such as high-low temperature resistant, salt spray resistance, UV resistant need to be taken into account in specific selection uses ring
Border, it is generally preferable to using having many advantages, such as the high resinae composite material of light intensity, other superior performances can also be selected
Metal material is to meet corresponding performance design requirement.
Slot cover can be pressed according to structure matching mode into the interior hexagonal flower pattern slot of fastener in use.Slot cover surface
Coating can be coated, as needed to meet concealed requirement.
On the other hand, for the disassembly of A type groove lid, the invention also provides corresponding slot cover extracting tools.If Fig. 5 is this
A kind of slot cover extracting tool schematic diagram for A type groove lid of inventive embodiments.The slot cover extracting tool of A type groove lid include by
The handle portion 7 and crawl section 8 that one metal strip is folded to form, wherein handle portion 7 is the ring structure that intermediate bending part is formed, and is grabbed
Taking portion 8 is the elastic opening-closing structure formed by the outside bending in metal strip both ends, which can be at both ends
Elasticity opens and closes at dog-ear, for protruding into the first through hole 4 of outer-hexagonal flower type structure 3 by the second through-hole 5 on circular base 2
In, contact and grab the sloping platform terrace of circular base 2.
It is corresponding to use A type extracting tool when using A type groove lid, being a kind of type groove lid for A of the invention such as Fig. 6
Slot cover extracting tool usage scenario schematic diagram.By mediating the handle portion 7 of tool, insert a tool into the stepped hole of slot cover, pine
Go into operation tool, is stuck at the stepped hole of A type groove lid after enabling tool elastic reset, is pulled upwardly tool, by slot cover from fastener
It is taken out in the driver slot of twisting, after disassembly, slot cover can retain recycling.
The third aspect, for the dismounting of Type B slot cover, the invention also provides corresponding another slot cover extracting tools.Such as
Fig. 7 is that the another kind of the embodiment of the present invention is used for the slot cover extracting tool schematic diagram of Type B slot cover.The slot cover of Type B slot cover is dismantled
Tool also includes handle portion 7 and crawl section 8, which is circular ring structure, and crawl section 8 is a T-type structure, the T-type structure
The connection of the handle portion 7 of straight-bar portion and ring structure, the wide head of T-type structure are used to stretch by the rectangular shaped slot 6 of circular base 2
Enter in the first through hole 4 of outer-hexagonal flower type structure 3, contacts and grab the flat gripping surface of circular base 2.
It is corresponding to use Type B extracting tool when using Type B slot cover, by the rectangular channel of the wide head matching slot cover of the T-type of tool
Slot cover is simultaneously inserted into hole 6, by 90 ° of the wide end rotation of T-type, is pulled upwardly tool by handle portion 7, by slot cover from fastener twisting
It is taken out in driver slot.After disassembly, slot cover can still retain recycling.
In addition, not needing the extracting tool of design specialized for C-shaped channel lid, the flat of vacuum suction circular base 2 can be passed through
Face bottom surface is taken out it by pull of vacuum from the driver slot of fastener twisting.Equally, after disassembly, slot cover, which can still retain, to be followed
Ring uses.
It should be clear that all the embodiments in this specification are described in a progressive manner, each embodiment it
Between the same or similar part may refer to each other, the highlights of each of the examples are it is different from other embodiments it
Place.The invention is not limited to particular step described above and shown in figure and structures.Also, for brevity,
Here the detailed description to known method technology is omitted.
The above description is only an example of the present application, is not restricted to the application.The scope of the present invention is not being departed from
In the case where to those skilled in the art, various changes and changes are possible in this application.It is all in spirit herein and
Any modification, equivalent replacement, improvement and so within principle, should be included within the scope of claims hereof.
Claims (10)
1. being used for the slot cover of fastener driver slot, the fastener driver slot is interior hexagonal flower pattern slot structure, which is characterized in that institute
Stating slot cover includes circular base and outer-hexagonal flower type structure, the outer-hexagonal flower type structure of the slot cover and the fastener driver slot
Interior hexagonal flower pattern slot structure match, the bottom surface of the circular base of the slot cover is plane.
2. the slot cover according to claim 1 for fastener driver slot, which is characterized in that the outer-hexagonal flower type structure
Diagonal length it is equal with the diameter of the circular base.
3. the slot cover according to claim 1 for fastener driver slot, which is characterized in that the outer-hexagonal flower of the slot cover
The center of type structure is provided with first through hole.
4. the slot cover according to claim 3 for fastener driver slot, which is characterized in that the circular base of the slot cover
Center be provided with the second through-hole, the first through hole is coaxial with second through-hole and penetrates through, the diameter ratio of the first through hole
The diameter of second through-hole is big.
5. the slot cover according to claim 4 for fastener driver slot, which is characterized in that the first through hole with it is described
The part of circular base intersection is sloping platform terrace, and the tilt angle of the sloping platform terrace is 15 ° ~ 45 °.
6. the slot cover according to claim 3 for fastener driver slot, which is characterized in that the circular base of the slot cover
Center be provided with rectangular shaped slot, the first through hole and the rectangular shaped slot penetrate through, and the first through hole and the round base
The part of body intersection is flat gripping surface.
7. the slot cover according to claim 1 for fastener driver slot, which is characterized in that the circular base with it is described
Outer-hexagonal flower type structure is entity structure, and both the circular base and the outer-hexagonal flower type structure are integrally molded so as reality
The slot cover of body structure.
8. the slot cover according to claim 1-8 for fastener driver slot, which is characterized in that the slot cover
Material is resinae composite material or metal material.
9. slot cover extracting tool, the disassembly for slot cover as claimed in claim 5, which is characterized in that including by a metal strip
The handle portion being folded to form and crawl section, the handle portion are the ring structure that intermediate bending part is formed, and the crawl section is served as reasons
The elastic opening-closing structure that the outside bending in metal strip both ends is formed, the elasticity opening-closing structure can be at the dog-ear at both ends
Elasticity folding, for being protruded by the second through-hole on the circular base in the first through hole of the outer-hexagonal flower type structure,
Contact and grab the sloping platform terrace of the circular base.
10. slot cover extracting tool, the disassembly for slot cover as claimed in claim 6, which is characterized in that including handle portion and grab
Portion is taken, the handle portion is circular ring structure, and the crawl section is a T-type structure, the straight-bar portion of the T-type structure and the annular
The handle portion of structure connects, and the wide head of the T-type structure is used to protrude by the rectangular shaped slot of the circular base described outer
In the first through hole of hexagonal flower type structure, the flat gripping surface of the circular base is contacted and grabbed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810975565.XA CN109026963B (en) | 2018-08-24 | 2018-08-24 | Slot cover for fastener driving slot and slot cover dismounting tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810975565.XA CN109026963B (en) | 2018-08-24 | 2018-08-24 | Slot cover for fastener driving slot and slot cover dismounting tool |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109026963A true CN109026963A (en) | 2018-12-18 |
| CN109026963B CN109026963B (en) | 2021-02-02 |
Family
ID=64627578
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810975565.XA Active CN109026963B (en) | 2018-08-24 | 2018-08-24 | Slot cover for fastener driving slot and slot cover dismounting tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109026963B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2093326A (en) * | 1936-06-05 | 1937-09-14 | Prentice G E Mfg Co | Key support |
| US3750259A (en) * | 1970-12-14 | 1973-08-07 | T Timmons | Method and apparatus for repairing threads of a through bore by installing a threaded sleeve |
| JP2005256993A (en) * | 2004-03-12 | 2005-09-22 | Takigen Mfg Co Ltd | Releasing device of detachment preventing tool for fastening part |
| CN1717548A (en) * | 2002-12-26 | 2006-01-04 | 西冈鋲螺株式会社 | Tightened part disconnection preventing device |
| CN202381499U (en) * | 2011-10-01 | 2012-08-15 | 张云龙 | Novel password double anti-theft nut for automobile wheel hubs and special tool thereof |
| CN205148226U (en) * | 2015-12-07 | 2016-04-13 | 中国南方电网有限责任公司调峰调频发电公司鲁布革水力发电厂 | Deep hole minor diameter sealing washer remove device |
| CN106870544A (en) * | 2017-02-11 | 2017-06-20 | 东莞市立信华五金科技有限公司 | A kind of anti-theft bolt easy to assemble and its special dismantling device |
-
2018
- 2018-08-24 CN CN201810975565.XA patent/CN109026963B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2093326A (en) * | 1936-06-05 | 1937-09-14 | Prentice G E Mfg Co | Key support |
| US3750259A (en) * | 1970-12-14 | 1973-08-07 | T Timmons | Method and apparatus for repairing threads of a through bore by installing a threaded sleeve |
| CN1717548A (en) * | 2002-12-26 | 2006-01-04 | 西冈鋲螺株式会社 | Tightened part disconnection preventing device |
| JP2005256993A (en) * | 2004-03-12 | 2005-09-22 | Takigen Mfg Co Ltd | Releasing device of detachment preventing tool for fastening part |
| CN202381499U (en) * | 2011-10-01 | 2012-08-15 | 张云龙 | Novel password double anti-theft nut for automobile wheel hubs and special tool thereof |
| CN205148226U (en) * | 2015-12-07 | 2016-04-13 | 中国南方电网有限责任公司调峰调频发电公司鲁布革水力发电厂 | Deep hole minor diameter sealing washer remove device |
| CN106870544A (en) * | 2017-02-11 | 2017-06-20 | 东莞市立信华五金科技有限公司 | A kind of anti-theft bolt easy to assemble and its special dismantling device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109026963B (en) | 2021-02-02 |
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