CN108514441B - Blood vessel punching assembly and puncher - Google Patents
Blood vessel punching assembly and puncher Download PDFInfo
- Publication number
- CN108514441B CN108514441B CN201810403290.2A CN201810403290A CN108514441B CN 108514441 B CN108514441 B CN 108514441B CN 201810403290 A CN201810403290 A CN 201810403290A CN 108514441 B CN108514441 B CN 108514441B
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- China
- Prior art keywords
- pull rod
- driving
- cutter shaft
- inner cutter
- handle
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- 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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- 238000004080 punching Methods 0.000 title claims abstract description 31
- 210000004204 blood vessel Anatomy 0.000 title abstract description 13
- 230000002792 vascular Effects 0.000 claims abstract description 17
- 230000033001 locomotion Effects 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 abstract description 4
- 238000012423 maintenance Methods 0.000 abstract description 4
- 230000008859 change Effects 0.000 abstract description 3
- 230000009471 action Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000001356 surgical procedure Methods 0.000 description 3
- 230000000747 cardiac effect Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 208000007536 Thrombosis Diseases 0.000 description 1
- 230000003872 anastomosis Effects 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 238000007675 cardiac surgery Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000002324 minimally invasive surgery Methods 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- 230000002980 postoperative effect Effects 0.000 description 1
- 230000004083 survival effect Effects 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/32—Surgical cutting instruments
- A61B17/3205—Excision instruments
- A61B17/32053—Punch like cutting instruments, e.g. using a cylindrical or oval knife
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B2017/0046—Surgical instruments, devices or methods, e.g. tourniquets with a releasable handle; with handle and operating part separable
- A61B2017/00464—Surgical instruments, devices or methods, e.g. tourniquets with a releasable handle; with handle and operating part separable for use with different instruments
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B2017/00743—Type of operation; Specification of treatment sites
- A61B2017/00778—Operations on blood vessels
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Surgery (AREA)
- Heart & Thoracic Surgery (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Surgical Instruments (AREA)
Abstract
The blood vessel punching assembly at least comprises an inner cutter shaft and an outer cutter edge sleeved outside the inner cutter shaft, wherein the inner cutter shaft stretches and contracts along the axis of the outer cutter edge under the drive of a driving pull rod; an inner cutter shaft connecting swing arm is connected between the inner cutter shaft and the driving pull rod, and the inner cutter shaft connecting swing arm is respectively and rotatably connected with the driving pull rod and the outer cutter edge; an outer pipe is sleeved outside the driving pull rod, an outer knife edge is fixedly connected with the end part of the outer pipe, and the outer knife edge and the outer pipe form an elbow structure; wherein the puncher includes the vascular punching subassembly of above-mentioned structure, and this vascular punching subassembly is connected with handle drive assembly transmission. The invention has flexible and reliable use, easy disassembly, assembly and replacement of parts and simple maintenance; the utility model has the advantages of it can change tool bit and punch the subassembly in a flexible way according to actual need, can adorn the tool bit that punches of different grade type (shape, size) on a handle and satisfy medical personnel's use, application scope is wide, washs thoroughly convenient.
Description
Technical Field
The invention relates to a vascular perforation device, in particular to a vascular perforation assembly and a puncher.
Background
In cardiac surgery, such as in coronary bypass surgery, it is often necessary to make a circular opening in the wall of the ascending aortic vessel for anastomosis of the bypass vessel. The traditional method is that a cardiac surgeon uses a surgical knife to cut round holes on the vascular wall, but the round holes cut by hand are extremely irregular, and residues of tissue fragments of the vascular wall are easy to remain in the surgical process, and the residual tissues tend to cause thrombus, so that the postoperative survival of a patient is threatened. With the development of cardiac surgical techniques, this method of knife punching is abandoned because it is too primitive and presents a surgical risk, and is gradually replaced by vascular punches.
In clinical practice, the puncher is not only applied to the punching operation of superficial surface blood vessels, but also needs to perform deep hole minimally invasive surgery in inner organs such as heart, and sometimes the punching angle cannot be right to an operator, and needs to perform elbow punching operation, so that the puncher with complicated structure and radial arm stretching function is needed; however, too complicated hole puncher not only has great cleaning difficulty and inflexible operation, but also can directly influence the quality of operation.
Disclosure of Invention
The invention aims to provide a blood vessel punching assembly and a puncher, which have the advantages of reliable structure, simple operation and convenient disassembly, assembly and cleaning.
The invention is realized in this way, a blood vessel perforating assembly, characterized by that, it includes at least inner arbor and outer knife edge that is set up outside the inner arbor, the inner arbor stretches out and draws back along the axis of the outer knife edge under the drive of a drive pull rod; an inner cutter shaft connecting swing arm is connected between the inner cutter shaft and the driving pull rod, and the inner cutter shaft connecting swing arm is respectively and rotatably connected with the driving pull rod and the outer cutter edge.
The outer pipe is sleeved outside the driving pull rod, the outer knife edge is fixedly connected with the end part of the outer pipe, and the outer knife edge and the outer pipe form an elbow structure.
Preferably, it is: the end part of the inner cutter shaft is of a spherical structure, the inner cutter shaft connecting swing arm is provided with a clamping groove which is in clamping fit with the spherical structure, and the cross section of the clamping groove is of a U-shaped structure.
The invention also discloses a puncher, which is characterized by comprising the blood vessel punching assembly with the structure, wherein the blood vessel punching assembly is in transmission connection with the handle driving assembly.
The handle driving assembly comprises a fixed handle and a movable handle which is rotationally connected with the fixed handle; one end of the driving pull rod extends into the fixed handle and stretches and moves in the fixed handle; a pull rod driving piece is connected between the part of the driving pull rod positioned in the fixed handle and the movable handle.
And a first elastic sheet and a second elastic sheet which enable the fixed handle and the movable handle to be at the maximum opening angle are arranged between the fixed handle and the movable handle.
The fixed handle is internally provided with a guide groove matched with the driving pull rod in a telescopic movement way, the driving pull rod and the pull rod driving piece are detachably connected together through a clamping structure, the pull rod driving piece is rotationally connected with the movable handle, and a torsion spring which enables the driving pull rod and the pull rod driving piece to keep clamping fit is further arranged between the pull rod driving piece and the movable handle.
Preferably, it is: the clamping structure comprises a pull rod clamping pin positioned on the pull rod driving piece and an opening clamping groove positioned on the driving pull rod, and the pull rod clamping pin is clamped and matched with the opening clamping groove under the action of the elastic force of the torsion spring.
Preferably, it is: the outer tube is connected to the fixed handle through a locking nut.
The beneficial effects of the invention are as follows: compared with the traditional instrument (straight-head puncher), the invention has the advantages of simple and convenient operation, no complexity, flexible and reliable use, easy disassembly and replacement of parts and convenient maintenance; the utility model has the advantages of it can change tool bit and punch the subassembly in a flexible way according to actual need, can adorn the tool bit that punches of different grade type (shape, size) on a handle and satisfy medical personnel's use, the function is abundant, application scope is wide, its nimble simple detachable construction also can make the apparatus wash more thoroughly.
Drawings
Fig. 1 is an exploded view of the structure of one embodiment of the hole puncher of the present invention.
Fig. 2 is a structural assembly diagram of the embodiment shown in fig. 1.
Fig. 3 is a partial structural cross-sectional view of the embodiment shown in fig. 1.
Fig. 4 is a schematic view showing the assembly and disassembly of the vascular punch assembly and the handle drive assembly of the present invention.
Fig. 5 is a schematic diagram of a connection structure of an inner cutter shaft 1, an inner cutter shaft connecting swing arm 3 and a driving pull rod 4.
Fig. 6 is a schematic diagram of the process of dismounting the connecting swing arm 3 of the blood knife shaft 1 and the inner knife shaft.
In the figure, 1, an inner cutter shaft 2, an outer cutter edge 3, an inner cutter shaft connecting swing arm 4, a driving pull rod 5, an outer pipe 6, a fixed handle 7, a movable handle 8, a first elastic sheet 9, a second elastic sheet 10, a torsion spring 11, a pull rod driving sheet 12, a pull rod clamping pin 13 and a locking nut.
Detailed Description
The following describes the embodiments of the present invention further with reference to the drawings.
As shown in fig. 5 and 6, the present invention is implemented in such a way that the vascular punching assembly at least comprises an inner cutter shaft 1 and an outer cutter edge 2 sleeved outside the inner cutter shaft 1, and the inner cutter shaft 1 stretches and contracts along the axis of the outer cutter edge 2 under the driving of a driving pull rod 4; an inner cutter shaft connecting swing arm 3 is connected between the inner cutter shaft 1 and the driving pull rod 4, and the inner cutter shaft connecting swing arm 3 is respectively and rotatably connected with the driving pull rod 4 and the outer cutter edge 2; when the tool is installed, the axis of the outer cutter edge 2 is coaxially arranged with the inner cutter shaft 1, the inner cutter shaft connecting swing arm 3 rotates along the rotating shaft of the inner cutter shaft connecting swing arm 2 and the outer cutter edge 2 under the driving of the driving pull rod 4, as shown in F3 of fig. 5, the inner cutter shaft 1 stretches and contracts along the axis of the outer cutter edge 2 under the driving of the inner cutter shaft connecting swing arm 3, as shown in F4 of fig. 5, and therefore the vascular punching action is completed by the cooperation of the inner cutter shaft 1 and the outer cutter edge 2.
In order to improve the protection and the flexibility of use, the outer part of the driving pull rod 4 is sleeved with an outer pipe 5, the outer knife edge 2 is fixedly connected with the end part of the outer pipe 5, and the outer knife edge 2 and the outer pipe 5 form an elbow structure which allows the inner knife shaft 1 and the driving pull rod 4 as well as the outer knife edge 2 and the driving pull rod 4 to be in non-linear punching driving, so that the punching operation applicability is wider.
Of course, in order to facilitate disassembly and maintenance, the invention also optimizes the detail structure of the vascular punching assembly, and in the concrete implementation, the end part of the inner cutter shaft 1 is a spherical structure 101, the inner cutter shaft connecting swing arm 3 is provided with a clamping groove 301 which is in clamping fit with the spherical structure 101, and the section of the clamping groove 102 is in a U-shaped structure, as shown in fig. 6; when the inner cutter shaft 1 is dismounted and mounted, the inner cutter shaft connecting swing arm 3 is matched with the clamping groove 102 with a specific shape through the spherical structure 101, and when the inner cutter shaft connecting swing arm 3 swings to a certain angle, the inner cutter shaft 1 can be dismounted from the outer cutter edge 2, and a new inner cutter shaft 1 can be replaced.
As shown in fig. 1-4, the present invention also discloses a hole puncher, which is structurally characterized in that the hole puncher comprises the blood vessel punching assembly with the structure, and the blood vessel punching assembly is in transmission connection with the handle driving assembly; in the specific implementation, the handle driving assembly comprises a fixed handle 6 and a movable handle 7 which is rotationally connected with the fixed handle 6; one end of the driving pull rod 4 extends into the fixed handle 6 and moves in a telescopic way in the fixed handle 6; a pull rod driving piece 11 is connected between the part of the driving pull rod 4 positioned in the fixed handle 6 and the movable handle 7; the operation process is that a user presses the movable handle 7 through the palm, the movable handle 7 drives the pull rod driving piece 11, and the pull rod driving piece 11 drives the driving pull rod 4 to stretch and retract in the fixed handle 6, so that the whole blood vessel punching assembly is driven to complete punching action; through the equipment of vascular punching subassembly and handle drive assembly for the operator can change vascular punching subassembly in a flexible way, and the dismouting of being convenient for is maintained, can satisfy the needs of deep hole minimal access surgery through changing vascular punching subassembly of different length specifications.
Of course, the structure of the handle driving assembly is not limited to this, and an electric structure can be adopted, at this time, the end part of the driving pull rod 4 is made into a screw rod, a driving thread sleeve is arranged on the screw rod, a motor is arranged in the handle, an output shaft of the motor is provided with a gear meshed with the driving thread sleeve for driving, thus the driving pull rod 4 with the screw rod can be driven by the motor to perform telescopic motion, and the flexible control can be realized by adjusting the steering and the rotating speed of the motor
Meanwhile, in order to improve the operation hand feeling, the invention also optimizes the detailed structure of the handle driving assembly, and when in specific implementation, a first elastic sheet 8 and a second elastic sheet 9 which enable the fixed handle 6 and the movable handle 7 to be at the maximum opening angle are arranged between the fixed handle 6 and the movable handle 7, and the fixed handle 6 and the movable handle 7 are opened to the maximum under the action of the first elastic sheet 8 and the second elastic sheet 9, so that the inner cutter shaft 1 and the outer cutter shaft 2 are also in a non-punching state.
In order to ensure smooth transmission of the punching control moment, a guide groove 601 which is matched with the driving pull rod 4 in a telescopic movement manner is arranged in the fixed handle 6, the driving pull rod 4 and the pull rod driving piece 11 are detachably connected together through a clamping structure, the pull rod driving piece 11 is rotationally connected with the movable handle 7, and a torsion spring 10 which enables the driving pull rod 4 and the pull rod driving piece 11 to be in clamping fit is further arranged between the pull rod driving piece 11 and the movable handle 7; in a specific implementation, the clamping structure comprises a pull rod clamping pin 12 positioned on the pull rod driving piece 11 and an opening clamping groove 401 positioned on the driving pull rod 4, wherein the pull rod clamping pin 12 is clamped and matched with the opening clamping groove 401 under the action of the elastic force of the torsion spring 10; the outer tube 5 is connected to the fixed handle 6 through a locking nut 13; of course, the structure is convenient to disassemble, assemble and maintain; in operation, when the vascular punch assembly needs to be replaced, as shown by F4 in fig. 4, only the force in the F4 direction is needed to press the pull rod driving plate 11 to overcome the torsion force of the torsion spring 10, and then the pull rod clamping pin 12 on the pull rod driving plate 11 is separated from the opening clamping groove 401 on the driving pull rod 4; when the lock nut 13 is reversely screwed and the screw teeth of the fixed handle 6 are tripped, the lock nut 13 drives the whole blood vessel punching assembly to be separated from the handle, so that the purpose of replacing the blood vessel punching assembly and the cutter head is realized.
Compared with the traditional instrument (straight-head puncher), the invention has the advantages of simple and convenient operation, no complexity, flexible and reliable use, easy disassembly and replacement of parts and convenient maintenance; under the condition that the knife edge of the inner knife shaft of the product is damaged, the whole set of equipment is not required to be replaced, and only the new inner knife shaft is required to be replaced; the product can be provided with punching tool bits of different types (shapes and sizes) on one handle to meet the use requirements of medical staff, so that the multifunctional function of one handle is achieved, and the flexible and simple detachable structure can also enable the instrument to be cleaned more thoroughly.
Claims (5)
1. The vascular punching assembly is characterized by at least comprising an inner cutter shaft (1) and an outer cutter edge (2) sleeved outside the inner cutter shaft (1), wherein the inner cutter shaft (1) stretches and contracts along the axis of the outer cutter edge (2) under the driving of a driving pull rod (4);
An inner cutter shaft connecting swing arm (3) is connected between the inner cutter shaft (1) and the driving pull rod (4), the inner cutter shaft connecting swing arm (3) is respectively connected with the driving pull rod (4) and the outer cutter edge (2) in a rotating way, wherein the axis of the outer cutter edge (2) is coaxially arranged with the inner cutter shaft (1), and the inner cutter shaft connecting swing arm (3) rotates along the rotating shaft of the outer cutter edge (2) under the driving of the driving pull rod (4);
An outer tube (5) is sleeved outside the driving pull rod (4), the outer knife edge (2) is fixedly connected with the end part of the outer tube (5), the outer knife edge (2) and the outer tube (5) form an elbow structure, and the elbow structure allows the inner knife shaft (1) and the driving pull rod (4) and the outer knife edge (2) and the driving pull rod (4) to be in non-linear punching driving;
the end part of the inner cutter shaft (1) is of a spherical structure (101), the inner cutter shaft connecting swing arm (3) is provided with a clamping groove (301) which is in clamping fit with the spherical structure (101), and the cross section of the clamping groove (301) is of a U-shaped structure.
2. A hole punch comprising the vascular punch assembly of claim 1 in driving connection with a handle drive assembly; wherein: the handle driving assembly comprises a fixed handle (6) and a movable handle (7) which is rotationally connected with the fixed handle (6); one end of the driving pull rod (4) extends into the fixed handle (6) and stretches and moves in the fixed handle (6); a pull rod driving sheet (11) is connected between the part of the driving pull rod (4) positioned in the fixed handle (6) and the movable handle (7); the fixed handle (6) is internally provided with a guide groove (601) which is in telescopic movement fit with the driving pull rod (4), the driving pull rod (4) is detachably connected with the pull rod driving piece (11) through a clamping structure, the pull rod driving piece (11) is rotationally connected with the movable handle (7), and a torsion spring (10) which enables the driving pull rod (4) to be in clamping fit with the pull rod driving piece (11) is further arranged between the pull rod driving piece (11) and the movable handle (7).
3. The hole puncher according to claim 2, characterized in that a first spring (8) and a second spring (9) are arranged between the fixed handle (6) and the movable handle (7) to enable the fixed handle (6) and the movable handle (7) to be at the maximum opening angle.
4. The hole puncher according to claim 2, characterized in that the clamping structure comprises a pull rod clamping pin (12) arranged on the pull rod driving piece (11) and an opening clamping groove (401) arranged on the driving pull rod (4), and the pull rod clamping pin (12) is clamped and matched with the opening clamping groove (401) under the elastic force of the torsion spring (10).
5. A hole punch according to any one of claims 2-4, wherein the outer tube (5) is connected to the stationary handle (6) by means of a lock nut (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810403290.2A CN108514441B (en) | 2018-04-28 | 2018-04-28 | Blood vessel punching assembly and puncher |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810403290.2A CN108514441B (en) | 2018-04-28 | 2018-04-28 | Blood vessel punching assembly and puncher |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108514441A CN108514441A (en) | 2018-09-11 |
| CN108514441B true CN108514441B (en) | 2024-06-18 |
Family
ID=63429631
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810403290.2A Active CN108514441B (en) | 2018-04-28 | 2018-04-28 | Blood vessel punching assembly and puncher |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108514441B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109758196A (en) * | 2019-02-28 | 2019-05-17 | 江苏义倍医疗科技股份有限公司 | A kind of celioscope stitching surgical structure |
| CN110338940B (en) * | 2019-08-22 | 2021-06-15 | 中国医学科学院阜外医院 | Bental is artificial blood vessel hole puncher for operation |
| CN110537944B (en) * | 2019-09-11 | 2024-05-07 | 首都医科大学附属北京安贞医院 | Aortic wall perforating device |
| CN110916767B (en) * | 2019-11-29 | 2020-08-28 | 南华大学附属第一医院 | Gastrointestinal tract perforator |
| CN112842476B (en) * | 2020-12-31 | 2022-03-22 | 河南科技大学第一附属医院 | Aorta blood vessel puncher capable of stably punching |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5910153A (en) * | 1996-12-04 | 1999-06-08 | Aesculap Ag & Co. Kg | Surgical punch |
| WO2016041465A1 (en) * | 2014-09-15 | 2016-03-24 | 上海林超医疗设备科技有限公司 | Minimally invasive surgical instrument |
| CN107961054A (en) * | 2017-12-11 | 2018-04-27 | 美茵（北京）医疗器械研发有限公司 | Minimally invasive haemostatic clamp convenient for disassembly and assembly |
| CN208709999U (en) * | 2018-04-28 | 2019-04-09 | 美茵（北京）医疗器械研发有限公司 | A kind of blood vessel punching component and punch |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5192294A (en) * | 1989-05-02 | 1993-03-09 | Blake Joseph W Iii | Disposable vascular punch |
| EP1410763A1 (en) * | 2002-10-14 | 2004-04-21 | Waldemar Link (GmbH & Co.) | Surgical working instrument |
| JP4681961B2 (en) * | 2005-01-14 | 2011-05-11 | オリンパスメディカルシステムズ株式会社 | Surgical instrument |
| US8348959B2 (en) * | 2006-03-23 | 2013-01-08 | Symmetry Medical Manufacturing, Inc. | Angled surgical driver |
| US8486098B2 (en) * | 2007-02-12 | 2013-07-16 | Joseph W Blake, III | Aortic punch |
| US9339321B2 (en) * | 2013-06-07 | 2016-05-17 | Zimmer Biomet Spine, Inc. | Angled instrument assembly |
| CN106214214B (en) * | 2013-11-29 | 2019-07-26 | 重庆西山科技股份有限公司 | Medical grinding knife tool |
| DE202016107261U1 (en) * | 2015-12-28 | 2017-02-03 | Oplnstruments GmbH | Non-invasive and freely bendable vascular occlusion forceps |
| CN107951534A (en) * | 2017-12-12 | 2018-04-24 | 王亚军 | A kind of ultrasound orthopaedics drilling equipment |
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2018
- 2018-04-28 CN CN201810403290.2A patent/CN108514441B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5910153A (en) * | 1996-12-04 | 1999-06-08 | Aesculap Ag & Co. Kg | Surgical punch |
| WO2016041465A1 (en) * | 2014-09-15 | 2016-03-24 | 上海林超医疗设备科技有限公司 | Minimally invasive surgical instrument |
| CN107961054A (en) * | 2017-12-11 | 2018-04-27 | 美茵（北京）医疗器械研发有限公司 | Minimally invasive haemostatic clamp convenient for disassembly and assembly |
| CN208709999U (en) * | 2018-04-28 | 2019-04-09 | 美茵（北京）医疗器械研发有限公司 | A kind of blood vessel punching component and punch |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108514441A (en) | 2018-09-11 |
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