CN112568979A - Incision protective sleeve and processing technology thereof - Google Patents
Incision protective sleeve and processing technology thereof Download PDFInfo
- Publication number
- CN112568979A CN112568979A CN202011467234.9A CN202011467234A CN112568979A CN 112568979 A CN112568979 A CN 112568979A CN 202011467234 A CN202011467234 A CN 202011467234A CN 112568979 A CN112568979 A CN 112568979A
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- Prior art keywords
- ring
- silica gel
- inner ring
- elastic sleeve
- sleeve body
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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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- 230000001681 protective effect Effects 0.000 title claims abstract description 22
- 238000012545 processing Methods 0.000 title claims abstract description 13
- 238000005516 engineering process Methods 0.000 title claims description 10
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical group O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 99
- 239000000741 silica gel Substances 0.000 claims abstract description 48
- 229910002027 silica gel Inorganic materials 0.000 claims abstract description 48
- 239000007788 liquid Substances 0.000 claims abstract description 27
- 238000000034 method Methods 0.000 claims abstract description 20
- 238000000465 moulding Methods 0.000 claims abstract description 5
- 238000004519 manufacturing process Methods 0.000 claims description 9
- 239000011248 coating agent Substances 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 4
- 230000003631 expected effect Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229920001296 polysiloxane Polymers 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 206010052428 Wound Diseases 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000037237 body shape Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 208000015181 infectious disease Diseases 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000002324 minimally invasive surgery Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Images
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/34—Trocars; Puncturing needles
- A61B17/3417—Details of tips or shafts, e.g. grooves, expandable, bendable; Multiple coaxial sliding cannulas, e.g. for dilating
- A61B17/3421—Cannulas
- A61B17/3423—Access ports, e.g. toroid shape introducers for instruments or hands
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
Landscapes
- Health & Medical Sciences (AREA)
- Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Heart & Thoracic Surgery (AREA)
- Pathology (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)
- Oral & Maxillofacial Surgery (AREA)
- Surgical Instruments (AREA)
Abstract
An incision protective sleeve is characterized in that an elastic sleeve body is in a pipeline shape, the side wall of the elastic sleeve body is arranged in a concave manner, an upper ring is arranged at the upper end of the elastic sleeve body, and a lower ring is arranged at the lower end of the elastic sleeve body; the body of the upper ring contains an upper inner ring, and the body of the lower ring contains a lower inner ring. The forming mold adopted by the process is internally provided with a profiling cavity, and the profiling cavity comprises a ring groove and a profiling pipeline. The processing steps comprise: preparing a silica gel ring placed in the ring groove; wrapping the silica gel ring outside the inner ring and placing the silica gel ring into the ring groove; injecting liquid silica gel into the profiling cavity; and opening the die after molding to obtain the integrally connected incision protective sleeve. The invention firstly adopts a silica gel ring to wrap the plastic inner ring, then the plastic inner ring is placed in a cavity, and finally liquid silica gel is injected to be fused with the silica gel inner ring into a whole; the plastic inner ring has uniform external elasticity, and sufficient structural strength is obtained, so that the stability and elasticity of the whole structure are proper. Compared with the traditional process, the method has the advantages of few process steps, low cost, simple operation, good expected effect and suitability for popularization.
Description
Technical Field
The invention belongs to the technical field of medical supplies, and particularly relates to an incision protective sleeve and a processing technology thereof.
Background
In a surgical operation, when a surgeon makes an incision at a surgical site of a patient, the incision is closed by the contraction of tissue, and the incision needs to be stretched to perform the operation. In the early stage, people propped open by hands, metal retractors or draw hooks, but the metal retractors have the defects of uneven tension and limited visual field, even damage to tissues due to over-traction and secondary damage to wounds, and the use of the metal retractors increases the probability of infection of the incisions. At present, incision protection sleeves have been used in minimally invasive surgery to open the incision; the existing incision protective sleeve is generally an elastic cylindrical body, the incision protective sleeve is sleeved on the incision to open the incision, and a doctor can use instruments such as a scalpel and the like to perform an operation on a patient through a through hole of the incision protective sleeve.
Traditional incision protective sheath pattern is as shown in fig. 1 mostly, adopts silica gel integrated into one piece, and elasticity is better, is convenient for place incision department, and the incision of being convenient for is coincide. Later, in the in-process of using, the user finds that the incision protective sheath of pure silica gel material is softer relatively, especially the upper ring of cover body and lower ring department, and stability is relatively poor, produces the deformation easily, causes the influence to the operation. Later, designers have provided a ring of inner rings of plastic material in each of the upper and lower rings for better stability and strength.
At present, the incision protection sleeve produced by adopting the traditional plastic outer-packing silica gel process is inconvenient to prop up and fix the plastic inner ring in the cavity during production, so that a silica gel sleeve body with an upper end and a lower end capable of being clamped into the inner ring is required to be formed firstly, then the inner rings of the upper end and the lower end are respectively self-sealed and wrapped by silica gel, the three-step process is required to be completed, the process is complicated, the operation is inconvenient, and the cost is high. Moreover, the thickness of the silica gel layer of the sealing glue part is not uniform, which may cause insufficient elasticity when contacting with the incision, and easily damages skin tissues. Therefore, we have devised an incision protection cover and a processing technique thereof to solve the above problems.
It should be noted that the above background description is only for the sake of clarity and complete description of the technical solutions of the present invention and for the understanding of those skilled in the art. Such solutions are not considered to be known to the person skilled in the art merely because they have been set forth in the background section of the invention.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide an incision protection sleeve.
In order to achieve the above objects and other related objects, the present invention provides the following technical solutions: an incision protective sleeve comprises an upper ring, a lower ring and an elastic sleeve body, wherein the elastic sleeve body is in a pipeline shape, the side wall of the elastic sleeve body is arranged in a concave manner, the upper ring is arranged at the upper end of the elastic sleeve body, and the lower ring is arranged at the lower end of the elastic sleeve body; the body of the upper ring comprises an upper inner ring, and the body of the lower ring comprises a lower inner ring.
The preferable technical scheme is as follows: the upper ring, the lower ring and the elastic sleeve body are made of silica gel, the upper inner ring and the lower inner ring are made of plastic, and the upper ring, the lower ring and the elastic sleeve body are of an integrated connecting structure.
The invention also provides a processing technology of the incision protection sleeve, which comprises a forming die, wherein a profiling cavity is arranged in the forming die, and comprises a first annular groove corresponding to the upper ring shape, a second annular groove corresponding to the lower ring shape and a profiling pipeline corresponding to the elastic sleeve body shape;
the processing technology of the incision protective sleeve comprises the following steps:
the first step is as follows: preparing a plurality of first silica gel rings capable of being placed in a first ring groove and a plurality of second silica gel rings capable of being placed in a second ring groove, wherein the sections of the first silica gel rings and the second silica gel rings are C-shaped;
the second step is that: uniformly coating the first silica gel rings outside the upper inner ring and placing the silica gel rings into the first ring groove; uniformly coating the second silica gel rings outside the lower inner ring and placing the silica gel rings into a second ring groove;
the third step: injecting liquid silica gel into the profiling cavity and ensuring that the whole profiling cavity is filled with the liquid silica gel; when the liquid silica gel enters the first annular groove, the liquid silica gel is fused with the first silica gel ring into a whole, when the liquid silica gel enters the second annular groove, the liquid silica gel is fused with the second silica gel ring into a whole, and when the liquid silica gel enters the middle cavity, the elastic sleeve body is formed;
the fourth step: and after the silica gel is molded, opening the molding die to obtain the integrally connected incision protective sleeve.
The preferable technical scheme is as follows: the number of the first silica gel rings wrapped on the upper inner ring is more than or equal to three, and the number of the first silica gel rings wrapped on the lower inner ring is more than or equal to three.
The preferable technical scheme is as follows: the opening parts of the cross sections of the first silica gel ring and the second silica gel ring are arranged towards the inner side.
The preferable technical scheme is as follows: and a plurality of profiling cavities are arranged in the forming die.
The preferable technical scheme is as follows: the forming die is formed by stacking and combining a plurality of templates.
Due to the application of the technical scheme, compared with the prior art, the invention has the advantages that:
the invention relates to an incision protective sleeve and a processing technology thereof.A silica gel ring made of silica gel is adopted to wrap a plastic inner ring, then the plastic inner ring is placed into a cavity of a forming die, and finally liquid silica gel is injected to be fused with the silica gel inner ring into a whole; the silica gel layer with uniform thickness is arranged outside the plastic inner ring, the silica gel elasticity of the contact position of the notch is uniform, and enough structural strength is obtained, so that the stability and the elasticity of the whole structure are proper, and the using effect is good. Compared with the traditional process, the process has the advantages of few process steps, greatly reduced cost, simple operation mode, good expected effect, great creativity and practicability, and is suitable for popularization.
Drawings
FIG. 1 is a perspective view of an incision protection cover.
FIG. 2 is a top view of the incision protection cover.
Fig. 3 is a sectional view a-a.
Fig. 4 is a schematic perspective view of a molding die.
Fig. 5 is an exploded view of the forming die.
Fig. 6 is a schematic view of the assembly of the silicone ring and the inner ring.
In the above drawings, an upper ring 1, a lower ring 2, an elastic sleeve body 3, an upper inner ring 4, a lower inner ring 5, a first silica gel ring 6 and a second silica gel ring 7.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
Please refer to fig. 1 to 6. It should be understood that in the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship which the product of the present invention is usually placed in when used, which is only for the convenience of describing the present invention and simplifying the description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance. The terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should be further noted that, unless otherwise specifically stated or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may include, for example, a fixed connection, a detachable connection, an integral connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection via an intermediate medium, and a communication between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example (b): as shown in fig. 1 to 3, an incision protection cover includes an upper ring 1, a lower ring 2 and an elastic sleeve body 3, wherein the elastic sleeve body 3 is in a pipeline shape and the side wall is recessed, the upper ring 1 is disposed at the upper end of the elastic sleeve body 3, and the lower ring 2 is disposed at the lower end of the elastic sleeve body 3; the body of the upper ring 1 contains an upper inner ring 4 and the body of the lower ring 2 contains a lower inner ring 5.
The preferred embodiment is: as shown in fig. 1 to 3, the upper ring 1, the lower ring 2 and the elastic sleeve 3 are made of silica gel, the upper inner ring 4 and the lower inner ring 5 are made of plastic, and the upper ring 1, the lower ring 2 and the elastic sleeve 3 are an integrated connecting structure.
As shown in fig. 4 to 5, a processing technology of an incision protection sleeve includes a forming mold, a profiling cavity is arranged in the forming mold, and the profiling cavity includes a first ring groove corresponding to the shape of an upper ring 1, a second ring groove corresponding to the shape of a lower ring 2, and a profiling pipeline corresponding to the shape of an elastic sleeve body 3;
the processing technology of the incision protective sleeve comprises the following steps:
the first step is as follows: preparing a plurality of first silica gel rings 6 which can be placed in the first ring grooves and a plurality of second silica gel rings 7 which can be placed in the second ring grooves, wherein the sections of the first silica gel rings 6 and the second silica gel rings 7 are C-shaped; the shape of the first silica gel ring 6 is arranged corresponding to the first ring groove, and the shape of the second silica gel ring 7 is arranged corresponding to the second ring groove.
The second step is that: uniformly wrapping the first silica gel rings 6 outside the upper inner ring 4 and placing the silica gel rings into the first ring groove; uniformly wrapping the second silica gel rings 7 outside the lower inner ring 5 and placing the silica gel rings into a second ring groove; the size of the C-shaped opening is designed according to the size of the plastic inner ring, so that the plastic inner ring is convenient to plug in and cannot fall out.
The third step: injecting liquid silica gel into the profiling cavity and ensuring that the whole profiling cavity is filled with the liquid silica gel; when the liquid silica gel enters the first annular groove, the liquid silica gel is fused with the first silica gel ring 6 into a whole, when the liquid silica gel enters the second annular groove, the liquid silica gel is fused with the second silica gel ring 7 into a whole, and when the liquid silica gel enters the middle cavity, the elastic sleeve body 3 is formed;
the fourth step: and after the silica gel is molded, opening the molding die to obtain the integrally connected incision protective sleeve.
The preferred embodiment is: as shown in fig. 6, the number of the first silica gel rings wrapped on the upper inner ring is greater than or equal to three, and the number of the first silica gel rings wrapped on the lower inner ring is greater than or equal to three. The silica gel ring quantity is three at least, and the equipartition formula parcel can guarantee that the atress is even on the inner ring, supports stably.
The preferred embodiment is: as shown in fig. 3, the openings of the cross sections of the first silicone ring 6 and the second silicone ring 7 are both disposed toward the inner side. The liquid silica gel of being convenient for gets into in the C type opening, guarantees the integration integrality of integral type structure, and stability is good, the operation of being convenient for.
The preferred embodiment is: as shown in fig. 4 to 5, a plurality of profiling cavities are arranged in the forming die. A plurality of incision protective sheaths are formed together, so that the production efficiency is improved. When the forming die is designed, the plurality of profiling cavities can be communicated to one inlet, so that liquid silica gel can be conveniently injected, and the production efficiency is improved.
The preferred embodiment is: as shown in fig. 4 to 5, the forming mold is formed by stacking and combining a plurality of mold plates. The production and processing are convenient, the installation and the disassembly are convenient, and the practicability is strong.
The invention relates to an incision protective sleeve and a processing technology thereof.A silica gel ring made of silica gel is adopted to wrap a plastic inner ring, then the plastic inner ring is placed into a cavity of a forming die, and finally liquid silica gel is injected to be fused with the silica gel inner ring into a whole; the silica gel layer with uniform thickness is arranged outside the plastic inner ring, the silica gel elasticity of the contact position of the notch is uniform, and enough structural strength is obtained, so that the stability and the elasticity of the whole structure are proper, and the using effect is good. Compared with the traditional process, the process has the advantages of few process steps, greatly reduced cost, simple operation mode, good expected effect, great creativity and practicability, and is suitable for popularization.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (7)
1. The utility model provides an incision protective sheath, includes upper ring, lower ring and the elastic sleeve body, its characterized in that: the elastic sleeve body is in a pipeline shape, the side wall of the elastic sleeve body is arranged in an inwards concave manner, the upper ring is arranged at the upper end of the elastic sleeve body, and the lower ring is arranged at the lower end of the elastic sleeve body; the body of the upper ring comprises an upper inner ring, and the body of the lower ring comprises a lower inner ring.
2. An incision protective cover according to claim 1, wherein: the upper ring, the lower ring and the elastic sleeve body are made of silica gel, the upper inner ring and the lower inner ring are made of plastic, and the upper ring, the lower ring and the elastic sleeve body are of an integrated connecting structure.
3. The process for manufacturing an incision protection cover according to claim 2, wherein: the forming die is internally provided with a profiling cavity, and the profiling cavity comprises a first annular groove corresponding to the upper ring in shape, a second annular groove corresponding to the lower ring in shape and a profiling pipeline corresponding to the elastic sleeve in shape;
the processing technology of the incision protective sleeve comprises the following steps:
the first step is as follows: preparing a plurality of first silica gel rings capable of being placed in a first ring groove and a plurality of second silica gel rings capable of being placed in a second ring groove, wherein the sections of the first silica gel rings and the second silica gel rings are C-shaped;
the second step is that: uniformly coating the first silica gel rings outside the upper inner ring and placing the silica gel rings into the first ring groove; uniformly coating the second silica gel rings outside the lower inner ring and placing the silica gel rings into a second ring groove;
the third step: injecting liquid silica gel into the profiling cavity and ensuring that the whole profiling cavity is filled with the liquid silica gel; when the liquid silica gel enters the first annular groove, the liquid silica gel is fused with the first silica gel ring into a whole, when the liquid silica gel enters the second annular groove, the liquid silica gel is fused with the second silica gel ring into a whole, and when the liquid silica gel enters the middle cavity, the elastic sleeve body is formed;
the fourth step: and after the silica gel is molded, opening the molding die to obtain the integrally connected incision protective sleeve.
4. The process for manufacturing an incision protection cover according to claim 3, wherein: the number of the first silica gel rings wrapped on the upper inner ring is more than or equal to three, and the number of the first silica gel rings wrapped on the lower inner ring is more than or equal to three.
5. The process for manufacturing an incision protection cover according to claim 4, wherein: the opening parts of the cross sections of the first silica gel ring and the second silica gel ring are arranged towards the inner side.
6. The process for manufacturing an incision protection cover according to claim 5, wherein: and a plurality of profiling cavities are arranged in the forming die.
7. The process for manufacturing an incision protection cover according to claim 6, wherein: the forming die is formed by stacking and combining a plurality of templates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011467234.9A CN112568979A (en) | 2020-12-14 | 2020-12-14 | Incision protective sleeve and processing technology thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011467234.9A CN112568979A (en) | 2020-12-14 | 2020-12-14 | Incision protective sleeve and processing technology thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112568979A true CN112568979A (en) | 2021-03-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011467234.9A Pending CN112568979A (en) | 2020-12-14 | 2020-12-14 | Incision protective sleeve and processing technology thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112568979A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020074688A1 (en) * | 2000-12-15 | 2002-06-20 | Smith Keith A. | Method of injection molding around the surface of an object |
| CN200939151Y (en) * | 2006-08-18 | 2007-08-29 | 焦永春 | Belly dilatation transition device |
| US20080281162A1 (en) * | 2007-05-11 | 2008-11-13 | Applied Medical Resources Corporation | Surgical retractor |
| KR101086025B1 (en) * | 2011-01-18 | 2011-11-22 | (주)메다스 | An easy manufacturable and installable wound retractor |
| CN102743199A (en) * | 2011-04-20 | 2012-10-24 | 北京航天卡迪技术开发研究所 | Cut protection retractor |
| CN204072183U (en) * | 2014-06-28 | 2015-01-07 | 安徽奥弗医疗设备科技有限公司 | Silica gel type otch retracts dilator |
| CN204306853U (en) * | 2014-12-02 | 2015-05-06 | 深圳市安特高科实业有限公司 | Fixed high incision protection retractor |
| CN107283729A (en) * | 2017-08-24 | 2017-10-24 | 江阴澄云机械有限公司 | One kind injection chain processing method |
| CN206675553U (en) * | 2016-11-24 | 2017-11-28 | 无锡荣邦医疗科技有限公司 | Incision expander and its snap ring |
| CN109454811A (en) * | 2018-12-29 | 2019-03-12 | 武汉康塔医疗科技有限公司 | A kind of production method of fixed high incision protection expander |
-
2020
- 2020-12-14 CN CN202011467234.9A patent/CN112568979A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020074688A1 (en) * | 2000-12-15 | 2002-06-20 | Smith Keith A. | Method of injection molding around the surface of an object |
| CN200939151Y (en) * | 2006-08-18 | 2007-08-29 | 焦永春 | Belly dilatation transition device |
| US20080281162A1 (en) * | 2007-05-11 | 2008-11-13 | Applied Medical Resources Corporation | Surgical retractor |
| KR101086025B1 (en) * | 2011-01-18 | 2011-11-22 | (주)메다스 | An easy manufacturable and installable wound retractor |
| CN102743199A (en) * | 2011-04-20 | 2012-10-24 | 北京航天卡迪技术开发研究所 | Cut protection retractor |
| CN204072183U (en) * | 2014-06-28 | 2015-01-07 | 安徽奥弗医疗设备科技有限公司 | Silica gel type otch retracts dilator |
| CN204306853U (en) * | 2014-12-02 | 2015-05-06 | 深圳市安特高科实业有限公司 | Fixed high incision protection retractor |
| CN206675553U (en) * | 2016-11-24 | 2017-11-28 | 无锡荣邦医疗科技有限公司 | Incision expander and its snap ring |
| CN107283729A (en) * | 2017-08-24 | 2017-10-24 | 江阴澄云机械有限公司 | One kind injection chain processing method |
| CN109454811A (en) * | 2018-12-29 | 2019-03-12 | 武汉康塔医疗科技有限公司 | A kind of production method of fixed high incision protection expander |
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Application publication date: 20210330 |
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