CN219629723U - Sheath adjusting structure and medical grinding tool - Google Patents
Sheath adjusting structure and medical grinding tool Download PDFInfo
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- CN219629723U CN219629723U CN202321001150.5U CN202321001150U CN219629723U CN 219629723 U CN219629723 U CN 219629723U CN 202321001150 U CN202321001150 U CN 202321001150U CN 219629723 U CN219629723 U CN 219629723U
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- sheath
- sleeve
- adjusting sleeve
- adjusting
- limiting
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- 238000000227 grinding Methods 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 claims description 7
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000003801 milling Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000001356 surgical procedure Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
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Abstract
The utility model provides a sheath adjusting structure and a medical grinding cutter, wherein the sheath adjusting structure is used for being connected with a sheath and comprises a hand support body, an adjusting sleeve, a push sleeve and a pull tube, and the adjusting sleeve is sleeved on the support body and can axially move relative to the support body; the pushing sleeve and the adjusting sleeve are relatively fixed in the axial direction, and the pushing sleeve is driven to axially move relative to the supporting body through the axial movement of the adjusting sleeve; one end of the pulling pipe is used for being connected with the sheath, and the other end of the pulling pipe is fixedly connected with the pushing sleeve; when the adjusting sleeve moves axially relative to the supporting body, the pulling tube and the protecting sheath are driven to move relative to the supporting body by the pushing sleeve. Compared with the prior art, through protecting sheath adjusting structure in this scheme, adjusted the position of sheath on the mill, make the cutter possess not have the sheath state and have the sheath state, the doctor of being convenient for switches the condition of sheath as required when the operation, and need not to change the cutter and perform the operation, greatly reduced the complicacy of operation flow.
Description
Technical Field
The utility model belongs to the technical field of medical instruments, and particularly relates to a sheath adjusting structure and a medical grinding cutter.
Background
Spinal drills used in surgical procedures are used in spinal procedures; most of the existing spinal drill bits are of a single sheath structure or a sheath-free structure, wherein the single sheath structure is that a sheath is arranged at the drill bit, and when a part of tissues to be protected are not cut in the operation process, the spinal drill bit with the sheath is often favored by doctors; however, due to the existence of the sheath, the partial area of the cutter is limited during cutting, and the whole focus tissue cannot be completely resected, so that a doctor can use the spine drill without the sheath structure. However, the use of two types of spinal drills by a doctor in one operation complicates the surgical procedure, and thus there is a great need for a surgical tool that can simultaneously meet the above two requirements.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, an object of the present utility model is to provide a sheath adjusting structure and a medical grinding tool, which are used for solving the problem that in the prior art, frequent tool replacement is required according to the needs of doctors during the use.
To achieve the above object and other related objects, the present utility model provides the following technical solutions:
a sheath adjustment structure for connection with a sheath, comprising:
a support body;
the adjusting sleeve is sleeved on the supporting body and can axially move relative to the supporting body;
the pushing sleeve and the adjusting sleeve are fixed relatively in the circumferential direction, and the pushing sleeve is driven to axially move relative to the supporting body through the axial movement of the adjusting sleeve;
one end of the pulling pipe is fixedly connected with the sheath, and the other end of the pulling pipe is connected with the push sleeve;
when the adjusting sleeve moves axially relative to the supporting body, the push sleeve drives the pull tube and the sheath to move axially relative to the supporting body.
Optionally, the support body includes connecting portion, connecting portion are equipped with the external screw thread, the adjusting sleeve cup joint in the position of connecting portion be provided with external screw thread complex internal screw thread.
Optionally, the push sleeve includes the cover body and follows the radial convex support arm of cover body, the inner wall of adjusting sleeve is equipped with the spacing groove in radial, the support arm is located the spacing inslot, just the support arm is in the axial of adjusting sleeve is fixed relatively, when the adjusting sleeve moves for the supporter axial, the support arm is in the spacing inslot slides.
Optionally, the adjusting sleeve further comprises a first limiting ring and a second limiting ring, wherein the inner wall of the adjusting sleeve is provided with a first step, the first limiting ring is propped against the first step on the inner wall of the adjusting sleeve, the first limiting ring is provided with a second step, the second limiting ring is propped against the second step in the axial direction, and a gap between the first limiting ring and the second limiting ring forms the limiting groove.
Optionally, a supporting sleeve is sleeved in the supporting body, a sliding groove is axially formed in the supporting sleeve, the supporting sleeve is sleeved in the supporting sleeve, the support arm extends out of the sliding groove and can axially slide along the sliding groove, and the circumferential rotation of the sleeve relative to the supporting sleeve is limited by the sliding groove and the support arm.
Optionally, the support body is last the external screw thread is kept away from the one end of adjustment sleeve is equipped with the annular groove, the annular groove is embedded to be equipped with the O type circle, the O type circle is for the removal of adjustment portion provides resistance.
Optionally, the front end of adjusting collar is provided with front end spacing portion, the rear end of adjusting collar is provided with rear end spacing portion, front end spacing portion with rear end spacing portion is used for limiting the adjusting collar is followed supporter axial displacement.
Optionally, the rear end limiting part is a limiting step arranged on the supporting body, and the limiting step is used for limiting the axial moving distance of the adjusting sleeve along the supporting body.
Optionally, the front end limiting part comprises a connecting piece and a matching piece, the connecting piece is sleeved on the matching piece, and the matching piece is sleeved outside the pull tube and the sheath control push sleeve; the end part of the connecting piece is used for directly or indirectly propping against the adjusting sleeve and limiting the distance of the adjusting sleeve moving backwards along the axial direction of the supporting body.
Correspondingly, the utility model also provides a medical grinding tool, which comprises: a sheath adjustment structure as claimed in any one of the preceding claims; the method comprises the steps of,
the outer cutter assembly is directly or indirectly connected with the support body;
the inner cutter assembly is partially sleeved in the outer cutter assembly and comprises an inner cutter bar and a grinding head connected to the front end of the inner cutter bar, the pull tube is positioned between the inner cutter bar and the outer cutter assembly, and the front end of the pull tube is connected with a sheath;
when the adjusting sleeve moves axially relative to the supporting body, the pushing sleeve drives the pull tube and the sheath to move axially relative to the supporting body, so that the sheath part covers the grinding head or the grinding head is completely exposed out of the sheath.
According to the utility model, the sheath adjusting structure is arranged on the medical grinding cutter, the cutter part is fixedly connected with the support body, the adjusting sleeve is enabled to move along the axial direction of the support body by rotating the adjusting sleeve, the pushing sleeve and the pulling pipe are driven to move by the movement of the adjusting sleeve, so that the position of the sheath at the grinding head is adjusted, the grinding head can have two states of a sheath protecting structure or no sheath protecting structure, when a doctor needs two spinal drills in one operation, the cutter is not required to be replaced, the sheath protecting state can be adjusted according to actual requirements, the operation flow is greatly simplified, the operation of the doctor is reduced, and the use cost of the cutter is saved, wherein the operation is simple and convenient by rotating the adjusting part. The sheath adjusting structure in the scheme can be used for connecting the supporting body with the cutter body, and the adjusting sleeve can move along the supporting body and the cutter body, so that the position of the sheath relative to the cutter body is adjusted, and the sheath position on the drill bit is adjusted according to the requirements of doctors. Compared with the prior art, through protecting sheath adjusting structure in this scheme, adjusted the position of sheath on the mill, make the cutter possess not have the sheath state and have the sheath state, the doctor of being convenient for switches the condition of sheath as required when the operation, and need not to change the cutter and perform the operation, greatly reduced the complicacy of operation flow.
Drawings
FIG. 1 is a cross-sectional view of an exemplary sheath adjustment structure of the present utility model;
FIG. 2 is a structural cross-sectional view of a first state of an exemplary medical milling cutter of the present utility model;
FIG. 3 is a structural cross-sectional view of a second state of an exemplary medical milling cutter according to the present utility model;
FIG. 4 is a schematic view of an exemplary support body according to the present utility model;
FIG. 5 is a schematic view of an exemplary adjustment sleeve of the present utility model;
FIG. 6 is a schematic diagram of an exemplary sheath control push sleeve according to the present utility model;
FIG. 7 is a schematic view of an exemplary support sleeve of the present utility model;
fig. 8 is a schematic view of an exemplary sheath according to the present utility model.
The reference numerals in the embodiments include:
support body 100, connecting part 101, annular groove 102, O-ring 103, limit step 104, support sleeve 110, chute 111, connecting piece 120, mating piece 130,
The adjusting sleeve 200, the adjusting part 201, the connecting channel 202, the first step 203, the first limit ring 210, the second step 211, the second limit ring 212, the axial limit groove 213, the push sleeve 220, the sleeve body 221, the support arm 222,
A pull tube 300, a sheath 310,
Outer knife assembly 400, inner knife assembly 410, inner knife bar 411, grinding head 412,
An interface assembly 500.
Detailed Description
In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present utility model. It will be apparent, however, to one skilled in the art that the utility model may be practiced without one or more of these details. In other instances, well-known features have not been described in detail in order to avoid obscuring the utility model.
It should be understood that the present utility model may be embodied in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the utility model to those skilled in the art. In the drawings, like numbers refer to like elements throughout.
In the present utility model, the sheath adjusting structure is a part of the medical grinding tool, and the sheath adjusting structure is used for adjusting the position of the sheath 310 relative to the grinding head 412, so that the tool can meet the requirements of doctors. The specific structure of the medical grinding tool is shown in fig. 2 and 3, and includes a sheath adjusting structure, an inner knife assembly 410 and an outer knife assembly 400, where the sheath adjusting structure may be a sheath adjusting structure of any one of the following embodiments, and the sheath adjusting structure mainly includes a support body 100, an adjusting sleeve 200, a push sleeve 220 and a pull tube 300 that are sequentially connected; the outer cutter assembly 400 is directly or indirectly connected with the support body 100, the inner cutter assembly 410 is partially sleeved in the outer cutter assembly 400, the inner cutter assembly 410 comprises an inner cutter bar 411 and a grinding head 412 connected with the front end of the inner cutter bar 411, the pull tube 300 is positioned between the inner cutter bar 411 and the outer cutter assembly 400, and the front end of the pull tube 300 is connected with the sheath 310; when the adjusting sleeve 200 moves axially relative to the supporting body 100, the pushing sleeve 220 drives the pull tube 300 and the sheath 310 to move axially relative to the supporting body 100, so that the sheath 310 partially covers the grinding head 412 or the grinding head 412 completely exposes the sheath 310.
Specifically, in the actual implementation process, the rear end of the support body 100 is further provided with an interface component 500, and the interface component 500 extends into the support body 100 and is connected with the inner cutter bar 411 component; the adjusting sleeve 200 slides along the axial direction of the supporting body 100 and is switched between a first state and a second state; in the first state, as shown in fig. 2, the sheath 310 partially wraps the outside of the grinding head 412, so as to protect the part not to be ground when the grinding head works; in the second state, as shown in fig. 3, the sheath 310 is away from the grater 412, i.e., the grater 412 completely exposes the sheath 310.
The specific structure of the sheath adjusting structure in the present utility model, referring to fig. 1 to 8 in combination, includes:
a support body 100;
the adjusting sleeve 200 is sleeved on the supporting body 100 and can axially move relative to the supporting body 100;
the pushing sleeve 220 is fixed relative to the adjusting sleeve 200 in the circumferential direction, and the pushing sleeve 220 is driven to axially move relative to the supporting body 100 by the axial movement of the adjusting sleeve 200;
a pull tube 300, wherein one end of the pull tube 300 is fixedly connected with the sheath 310, and the other end is fixedly connected with the push sleeve 220;
when the adjusting sleeve 200 moves axially relative to the supporting body 100, the push sleeve 220 drives the pull tube 300 and the sheath 310 to move axially relative to the supporting body 100 along the supporting body 100.
Wherein, one end of the inner cutter bar 411 having the grinding head 412 is a front end, and the other end is a rear end, and the sheath 310, the pull tube 300, the push sleeve 220, the adjusting sleeve 200, and the supporting body 100 are sequentially arranged from the front end to the rear end along the radial direction of the inner cutter bar 411, wherein the adjusting sleeve 200 rotates along the supporting body 100 to drive the push sleeve 220, the pull tube 300, and the sheath 310 to move along the radial direction of the inner cutter bar 411, thereby adjusting the relative position of the sheath 310 and the grinding head 412.
In the practical implementation process, the sheath adjusting structure is arranged on the medical grinding tool, the medical grinding tool is fixedly connected with the supporting body 100, the adjusting sleeve 200 is enabled to move along the axial direction of the supporting body 100 through the rotating adjusting sleeve 200, the adjusting sleeve 200 moves to drive the pulling pushing sleeve 220 and the pulling tube 300 to move along with the pulling sleeve, the position of the sheath 310 at the grinding head 412 is enabled to be adjusted, the grinding head 412 can be enabled to have a sheath 310 structure or have two states without the sheath 310, when a doctor needs to use two spinal drills in one operation, the state of the sheath 310 can be adjusted according to actual requirements without changing the tool, the operation flow is greatly simplified, the operation cost of the doctor is reduced, and the use cost is saved, wherein the operation of the adjusting sleeve 200 can be simply and conveniently realized through rotating the adjusting sleeve 200.
In some embodiments, the support 100 includes a connection portion 101, the connection portion 101 is provided with external threads, and the position where the adjusting sleeve 200 is sleeved on the connection portion 101 is provided with an internal thread section matched with the external threads. For example, as shown in fig. 1 to 3 and fig. 4, the adjusting sleeve is internally provided with an internal thread segment, and the internal thread segment cooperates with the external thread to enable the adjusting sleeve 200 to move in the axial direction of the supporting body 100 by rotating the adjusting sleeve 200. In practice, the support body 100 and the adjustment sleeve 200 can also be axially movable on the support body 100 by means of a sliding connection.
In some embodiments, the push sleeve 220 includes a sleeve body 221 and a support arm 222 protruding radially along the sleeve body 221, the inner wall of the adjusting sleeve is provided with a limit groove 213 in a radial direction, the support arm 222 is located in the limit groove 213, the support arm 222 is relatively fixed in an axial direction of the adjusting sleeve 200, and when the adjusting sleeve 200 moves axially relative to the supporting body 100, the support arm 222 relatively slides in the limit groove. For example, as shown in fig. 1 to 3 and fig. 5, the adjusting sleeve is provided with a limiting groove 213 inside, and the adjusting sleeve 200 and the pushing sleeve 220 are axially and relatively fixed and circumferentially and relatively rotatably connected by rotating the supporting arm 222 in the limiting groove 213.
In some embodiments, the adjusting sleeve further comprises a first stop collar 210 and a second stop collar 212, the inner wall of the adjusting sleeve is provided with a first step 203, the first stop collar 210 abuts against the first step 203 of the inner wall of the adjusting sleeve, the first stop collar 210 is provided with a second step 211, the second stop collar 212 axially abuts against the second step 211, and a gap between the first stop collar 210 and the second stop collar 212 forms the stop groove 213. For example, as shown in fig. 1 to 3, the first stop collar 210 and the second stop collar 212 are engaged with each other, so that the stop groove 213 is formed in the adjusting sleeve, and the stop groove 213 is provided to facilitate the installation of the push sleeve 220.
In some embodiments, the support body 100 is sleeved with a support sleeve 110, a sliding groove 111 is axially formed in the support sleeve 110, the sleeve body 221 is sleeved with the support sleeve 110, the support arm 222 extends out of the sliding groove 111 and can slide axially along the sliding groove 111, and the sleeve body 221 is limited to rotate circumferentially relative to the support sleeve 110 through the sliding groove 111 and the support arm 222.
In the specific implementation, as shown in fig. 1 to 3, and fig. 7, the sliding groove 111 on the supporting sleeve 110 is arranged to limit the rotation of the supporting arm 222, so that the pushing sleeve 220 moves along the axial direction of the supporting body 100 along with the rotation of the adjusting sleeve 200, and the adjusting manner can make the radial position of the sheath 310 relative to the grinding head 412 unchanged, and only move in the axial direction.
In some embodiments, the support body 100 is provided with an annular groove 102 at an end of the external thread away from the adjusting sleeve 200, the annular groove 102 is embedded with an O-ring 103, and the O-ring 103 provides resistance to the movement of the adjusting portion 201. For example, as shown in fig. 1 to 3 and fig. 6, the inner wall of the adjusting sleeve 200 is closely attached to the O-ring 103, so that the rotation and movement of the adjusting sleeve 200 can generate a resistance feeling, so that the adjusting sleeve 200 is locked by the resistance feeling after adjusting the position of the sheath 310, and the sheath 310 is not moved.
In some embodiments, the front end of the adjusting sleeve 200 is provided with a front end limiting portion, the rear end of the adjusting sleeve 200 is provided with a rear end limiting portion, and the front end limiting portion and the rear end limiting portion are used for limiting the axial movement distance of the adjusting sleeve 200 along the supporting body 100. Specifically, the end of the adjusting sleeve 200 facing the grinding head 412 is the front end thereof, the end facing the interface assembly 500 is the rear end thereof, and the adjusting sleeve 200 is limited by the front end limiting part and the rear end limiting part, so as to limit the adjusting displacement of the sheath 310, and be beneficial to adjusting the medical grinding tool in the use process.
In some embodiments, the rear end limiting portion is a limiting step 104 disposed on the support body 100, and the limiting step 104 is used to limit the distance that the adjusting sleeve 200 moves axially rearward along the support body 100. For example, as shown in fig. 1 to 3, the limiting step 104 on the support 100 can limit the rightward movement of the adjusting sleeve 200, and thus limit the axial movement position of the adjusting sleeve 200 along the support 100.
In some embodiments, the front end limiting portion includes a connecting piece 120, the connecting piece 120 is sleeved on the supporting sleeve 110, and an end portion of the connecting piece 120 directly or indirectly abuts against the adjusting sleeve 200, so as to limit a distance that the adjusting sleeve 200 moves forward along the axial direction of the supporting body 100. For example, as shown in fig. 2 to 3, the coupling member 120 is internally provided with the engaging member 130, and the engaging member 130 is sleeved outside the supporting sleeve 110 and the pulling pipe 300, so that the front end of the adjusting sleeve 200 is limited in position when the adjusting sleeve 200 moves to adjust the position of the sheath 310.
The above embodiments are merely illustrative of the principles of the present utility model and its effectiveness, and are not intended to limit the utility model. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the utility model. Accordingly, it is intended that all equivalent modifications and variations of the utility model be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.
Claims (10)
1. A sheath adjustment mechanism for connection with a sheath, comprising:
a support body;
the adjusting sleeve is sleeved on the supporting body and can axially move relative to the supporting body;
the pushing sleeve and the adjusting sleeve are fixed relatively in the axial direction, and the pushing sleeve is driven to axially move relative to the supporting body through the axial movement of the adjusting sleeve;
one end of the pull tube is fixedly connected with the sheath, and the other end of the pull tube is connected with the push sleeve;
when the adjusting sleeve moves axially relative to the supporting body, the push sleeve drives the pull tube and the sheath to move axially relative to the supporting body.
2. The sheath adjustment structure of claim 1, wherein: the support body includes connecting portion, connecting portion are equipped with the external screw thread, the adjusting sleeve cup joint in the position of connecting portion be provided with external screw thread complex internal screw thread.
3. The sheath adjustment structure of claim 1, wherein: the push sleeve comprises a sleeve body and a support arm protruding radially along the sleeve body, wherein a limit groove is formed in the inner wall of the adjusting sleeve in the radial direction, the support arm is located in the limit groove and is relatively fixed in the axial direction of the adjusting sleeve, and when the adjusting sleeve moves axially relative to the supporting body, the support arm relatively slides in the limit groove.
4. A sheath adjustment structure according to claim 3, wherein: the adjusting sleeve is characterized by further comprising a first limiting ring and a second limiting ring, wherein a first step is arranged on the inner wall of the adjusting sleeve, the first limiting ring is propped against the first step on the inner wall of the adjusting sleeve, a second step is arranged on the first limiting ring, the second limiting ring is propped against the second step in the axial direction, and a limiting groove is formed in a gap between the first limiting ring and the second limiting ring.
5. A sheath adjustment structure according to claim 3, wherein: the support body endotheca has the support cover, the support is sheathe in and is seted up the spout along the axial, the cover body endotheca in the support cover, the support arm stretches out from in the spout to can follow the spout axial slip, through spout with the support arm restriction the cover is relative the support cover circumferential direction.
6. The sheath adjustment structure of claim 2, wherein: the support body is provided with an annular groove at one end of the external thread far away from the adjusting sleeve, an O-shaped ring is embedded in the annular groove, and the O-shaped ring provides resistance for movement of the adjusting sleeve.
7. The sheath adjustment structure of claim 5, wherein: the front end of the adjusting sleeve is provided with a front end limiting part, the rear end of the adjusting sleeve is provided with a rear end limiting part, and the front end limiting part and the rear end limiting part are used for limiting the axial moving distance of the adjusting sleeve along the supporting body.
8. The sheath adjustment structure of claim 7, wherein: the rear end limiting part is a limiting step arranged on the support body, and the limiting step is used for limiting the distance of the adjusting sleeve moving backwards along the axial direction of the support body.
9. The sheath adjustment structure of claim 7, wherein: the front end limiting part comprises a connecting piece, the connecting piece is sleeved on the supporting sleeve, and the end part of the connecting piece directly or indirectly abuts against the adjusting sleeve and is used for limiting the distance of the adjusting sleeve moving forwards along the axial direction of the supporting body.
10. A medical grinding tool, comprising: the sheath adjustment structure of any one of claims 1-9; the method comprises the steps of,
the outer cutter assembly is directly or indirectly connected with the support body;
the inner cutter assembly is partially sleeved in the outer cutter assembly and comprises an inner cutter bar and a grinding head connected to the front end of the inner cutter bar, the pull tube is positioned between the inner cutter bar and the outer cutter assembly, and the front end of the pull tube is connected with a sheath;
when the adjusting sleeve moves axially relative to the supporting body, the pushing sleeve drives the pull tube and the sheath to move axially relative to the supporting body, so that the sheath part covers the grinding head or the grinding head is completely exposed out of the sheath.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321001150.5U CN219629723U (en) | 2023-04-27 | 2023-04-27 | Sheath adjusting structure and medical grinding tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321001150.5U CN219629723U (en) | 2023-04-27 | 2023-04-27 | Sheath adjusting structure and medical grinding tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219629723U true CN219629723U (en) | 2023-09-05 |
Family
ID=87811371
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321001150.5U Active CN219629723U (en) | 2023-04-27 | 2023-04-27 | Sheath adjusting structure and medical grinding tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219629723U (en) |
-
2023
- 2023-04-27 CN CN202321001150.5U patent/CN219629723U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 401121 Jupiter science and technology development center, Gaoxin Park, northern New District, Yubei District, Chongqing (No. 9, middle section of Huangshan Avenue) Patentee after: CHONGQING XISHAN SCIENCE & TECHNOLOGY Co.,Ltd. Country or region after: China Address before: 401121 Jupiter Science and Technology Development Center, High tech Park, New North Zone, Beibei District, Chongqing (No. 9, Middle Section of Mount Huangshan Avenue) Patentee before: CHONGQING XISHAN SCIENCE & TECHNOLOGY Co.,Ltd. Country or region before: China |
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| CP03 | Change of name, title or address |