CN108999537B - Binding mechanism for container crane door frame and binding method thereof - Google Patents
Binding mechanism for container crane door frame and binding method thereof Download PDFInfo
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- CN108999537B CN108999537B CN201810872406.7A CN201810872406A CN108999537B CN 108999537 B CN108999537 B CN 108999537B CN 201810872406 A CN201810872406 A CN 201810872406A CN 108999537 B CN108999537 B CN 108999537B
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- hinge point
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- support plate
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- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B5/00—Doors, windows, or like closures for special purposes; Border constructions therefor
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- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B1/00—Border constructions of openings in walls, floors, or ceilings; Frames to be rigidly mounted in such openings
- E06B1/04—Frames for doors, windows, or the like to be fixed in openings
- E06B1/52—Frames specially adapted for doors
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Abstract
The invention discloses a binding mechanism for a container crane door frame, which comprises a door frame and a hinged point type support rod, wherein the hinged point type support rod is arranged on the door frame; the hinge point type stay bar is connected in the door frame body; a first support plate is arranged on the inner side of one side of the door frame body, a second support plate is arranged on the inner side of the other side of the door frame body, the first support plate is provided with a first positioning hole, the second support plate is provided with a second positioning hole, and the aperture of the first positioning hole is equal to that of the second positioning hole and is equal to the shaft diameter of the hinge point shaft; one end of the hinge point type support rod is provided with a first hinge point hole, the other end of the hinge point type support rod is provided with a second hinge point hole, the aperture of the first hinge point hole is smaller than that of the second hinge point hole, and the aperture of the first hinge point hole is equal to the shaft diameter of the hinge point shaft; one end of the hinge point type support rod is overlapped with the first positioning hole through the first hinge point hole and is fixed on the first support plate through the hinge point shaft, and the other end of the hinge point type support rod is overlapped with one of the second positioning holes through the second hinge point hole and is fixed on the second support plate through a heavy plate which is welded on the outer side of the second hinge point hole in a matched mode through the hinge point shaft.
Description
Technical Field
The invention relates to the technical field of container crane marine transportation binding, in particular to a binding mechanism for a container crane door frame and a binding method thereof.
Background
The conventional shore container crane needs to temporarily fix the stay bars on the door frames to enhance the bearing capacity of the whole door frames in the marine lashing process, but the conventional lashing mechanism and the lashing method thereof have the following defects:
1) the stay bar for marine binding is basically fixed on the door frame in a field welding mode, so that the binding welding amount is increased, and the construction period is prolonged;
2) limited by the space structure of the door frame, although the stay bar for marine binding is designed according to the size of a drawing, errors are inevitable in the installation and manufacturing of the door frame in the actual operation process, so that the manufactured stay bar needs to be repaired again according to the specific size of the door frame on site during installation, and the construction workload is increased;
3) the bracing piece for marine binding is generally designed based on the pertinence of the door frame, and once the bracing piece is welded and fixed on a specified door frame, the bracing piece can only be used on the door frame, and after the door frame is utilized, the bracing piece basically cannot be used any more, even if the bracing piece can be forcibly detached for reuse, the bracing piece for binding also needs to be secondarily transformed, so that the production cost is increased.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a binding mechanism for a container crane door frame and a binding method thereof, which enable materials for marine binding to be repeatedly used, do not need to accurately measure the door frame on a construction site, and shorten the construction period while ensuring the binding precision.
In order to achieve the purpose, the invention adopts the following technical scheme:
a binding mechanism used on a container crane door frame comprises a door frame and a hinged point type support rod; the door frame is of a square frame structure and comprises a plurality of door frame bodies, and the hinge point type stay bar is connected in the door frame bodies;
a plurality of distributed first support plates are arranged on the inner side of one side of the door frame body, an integral second support plate is arranged on the inner side of the other side of the door frame body, each first support plate is provided with a first positioning hole, the second support plate is provided with a plurality of second positioning holes, and the diameter of each first positioning hole is equal to that of each second positioning hole and is equal to the shaft diameter of the hinge point shaft;
one end of the hinge point type stay bar is provided with a first hinge point hole, the other end of the hinge point type stay bar is provided with a second hinge point hole, the aperture of the first hinge point hole is smaller than that of the second hinge point hole, and the aperture of the first hinge point hole is equal to the shaft diameter of the hinge point shaft;
one end of the hinge point type support rod is overlapped with the first positioning hole through the first hinge point hole and is fixed on the first support plate through the hinge point shaft, and the other end of the hinge point type support rod is overlapped with one of the second positioning holes through the second hinge point hole and is fixed on the second support plate through a heavy plate which is welded on the outer side of the second hinge point hole in a matched mode through the hinge point shaft.
Preferably, the number of the first support plates is equal to the number of the second positioning holes in the second support plate.
Preferably, both ends of the pivot point type stay bar are of a double-lug plate structure extending out in parallel up and down, and the first pivot point hole and the second pivot point hole are correspondingly and respectively arranged on the double-lug plate structure at both ends of the pivot point type stay bar; the first support plate and the second support plate are both of a single-lug plate structure, and the first positioning hole and the second positioning hole are correspondingly and respectively arranged on the single-lug plate structures of the first support plate and the second support plate; the single lug plate structures of the first support plate and the second support plate are correspondingly and respectively embedded into the double lug plate structures at two ends of the hinge point type support rod.
Preferably, the door frame body comprises an upper cross beam, a lower cross beam and two upright columns vertically connected between two ends of the upper cross beam and the lower cross beam; the upper part, the middle part and the lower part of one upright post are respectively provided with a first support plate, and the middle part of the other upright post is provided with a second support plate.
Preferably, the first support plate and the second support plate are fixed to the door frame by welding.
Preferably, the heavy pound plate is a ring piece with a ring hole in the middle, and the diameter of the ring hole is equal to the shaft diameter of the hinge point shaft.
The binding method based on the binding mechanism for the container crane door frame comprises the following operation steps:
the method comprises the following steps: the first support plate and the second support plate are correspondingly fixed to corresponding positions of the door frame body in a welding mode in the manufacturing stage of the door frame body; the first support plate and the second support plate correspondingly and respectively comprise a first positioning hole and a second positioning hole, and the aperture of the first positioning hole is equal to that of the second positioning hole and is equal to the shaft diameter of the hinge point shaft;
step two: roughly selecting a hinge point type support rod with corresponding length according to the distance between a first positioning hole in the first support plate and a second positioning hole in the second support plate, wherein a first hinge point hole is formed in one end of the hinge point type support rod, a second hinge point hole is formed in the other end of the hinge point type support rod, the aperture of the first hinge point hole is smaller than that of the second hinge point hole, and the aperture of the first hinge point hole is equal to the shaft diameter of a hinge point shaft;
step three: one end of the hinge point type supporting rod is overlapped with the first positioning hole through the first hinge point hole and is fixed on the first support plate through a hinge point shaft, and the other end of the hinge point type supporting rod is overlapped with one of the second positioning holes through the second hinge point hole and is fixed on the second support plate through a heavy plate which is welded on the outer side of the second hinge point hole in a matched mode through the hinge point shaft;
step four: after the door frame is used, the hinge point type support rod is detached from the door frame body for standby next time, and the hinge point type support rod is less damaged during detachment and can be continuously used due to the fact that the outside of the second hinge point hole relative to the heavy plate is only welded in the binding process.
Preferably, a first hinge point hole at one end of the hinge point type stay bar is a finished product hole and is finished by machining; and the second hinge point hole at the other end is a semi-finished hole and does not need machining.
Preferably, in the third step, one end of the pivot point type brace rod is overlapped with the first positioning hole through the first pivot point hole and fixed on the first support plate through the pivot point shaft, the other end of the pivot point type brace rod is overlapped with one of the second positioning holes through the second pivot point hole and overlapped with the heavy scale plate on the upper side and the lower side of the second pivot point hole, the pivot point shaft is sleeved on the pivot point shaft, the position of the heavy scale plate relative to the second pivot point hole is determined, and finally the heavy scale plate is welded on the outer side of the second pivot point hole relatively to enable the pivot point type brace rod to be rigidly and fixedly connected with the door frame body.
Preferably, when the hinge point shaft is installed, shaft clamping plates are padded at two outer side ends of the hinge point shaft.
The invention provides a binding mechanism for a container crane door frame and a binding method thereof, wherein a large hinged point hole and a small hinged point hole are correspondingly arranged at two connecting ends of a hinged point type stay bar, one small hinged point hole is matched with a positioning hole on a support plate at one side of a door frame body and is further fixed by a hinged point shaft, one large hinged point hole is matched with a positioning hole on a support plate at the other side of the door frame body and is further welded and fixed by a hinged point shaft weighting plate, the specific length of the hinged point type stay bar can be adjusted in a certain range aiming at the distance between the two positioning holes at the side, namely the relative position of the large hinged point hole and the positioning hole at the end is adjusted, so that the precision requirement for processing the hinged point type stay bar can be reduced, the working efficiency is further improved, meanwhile, the universality of the hinged point type stay bar is improved, namely, the application of the binding mechanism is convenient for installing the hinged point type stay bars with different lengths within, repeatedly usable (mainly the welding volume is few, and it is few to dismantle the damage), it can also reduce the construction cycle of marine ligature simultaneously, has improved the operating efficiency, has reduced the manufacturing cost of enterprise.
Drawings
FIG. 1 is a schematic structural view of a door frame of a container crane according to the present invention;
FIG. 2 is a schematic view of a door frame body of the door frame of the present invention;
FIG. 3 is a schematic view of the integral binding structure of one of the door frame bodies and the hinge point type stay bar of the door frame body of the present invention;
FIG. 4 is a schematic view of the binding structure of the first hinge point hole at one end of the hinge point type stay bar and the support plate of the invention;
fig. 5 is a schematic diagram of a binding structure of a second hinge point hole at the other end of the hinge point type stay bar and a support plate.
Wherein: 100. a door frame; 10. a door frame body; 10a, an upper cross beam; 10b, a lower cross beam; 10c, a column; 11. a first bracket plate; 11a, a first locating hole; 12. a second support plate; 12a, a second positioning hole; 13. a hinge point shaft; 14. a heavy duty plate; 15. a shaft clamping plate; 20. a hinged point type stay bar; 20a, a first hinge point hole; a second hinge point hole.
Detailed Description
The invention is further illustrated with reference to the following figures and examples.
As shown in fig. 1-5, a lashing mechanism for a container crane door frame includes a door frame 100 and a hinged point type stay 20; the door frame 100 is a square frame structure, and includes a plurality of door frame bodies 10, and the hinge point type stay bar 20 is connected in the door frame bodies 10;
a plurality of distributed first support plates 11 are arranged on the inner side of one side of the door frame body 10, an integral second support plate 12 is arranged on the inner side of the other side of the door frame body, each first support plate 11 is provided with a first positioning hole 11a, the second support plate 12 is provided with a plurality of second positioning holes 12a, the aperture of each first positioning hole 11a is equal to that of each second positioning hole 12a and is approximately equal to the shaft diameter of the hinge point shaft 13, and the aperture and the shaft diameter mentioned in the context refer to the diameters;
one end of the pivot point type brace rod 20 is provided with a first pivot point hole 20a, the other end is provided with a second pivot point hole 20b, the aperture of the first pivot point hole 20a is smaller than that of the second pivot point hole 20b, and the aperture of the first pivot point hole 20a is approximately equal to the shaft diameter of the pivot point shaft 13;
one end of the pivot point type brace 20 is overlapped with the first positioning hole 11a through a first pivot point hole 20a and fixed on the first support plate 11 by a pivot point shaft 13, and the other end is overlapped with one of the second positioning holes 12a through a second pivot point hole 20b and fixed on the second support plate 12 by a heavy plate 14 which is welded on the outer side of the second pivot point hole 20b in a matching way by the pivot point shaft 13.
Preferably, the number of the first support plates 11 is equal to the number of the second positioning holes 12a of the second support plate 12.
Preferably, both ends of the pivot point type stay bar 20 are double-lug plate structures extending in parallel up and down, and the first pivot point hole 20a and the second pivot point hole 20b are correspondingly and respectively arranged on the double-lug plate structures at both ends of the pivot point type stay bar 20; the first support plate 11 and the second support plate 12 are both of a single-lug plate structure, and the first positioning hole 11a and the second positioning hole 12a are correspondingly and respectively arranged on the single-lug plate structure of the first support plate 11 and the single-lug plate structure of the second support plate 12; the single-lug plate structures of the first support plate 11 and the second support plate 12 are correspondingly embedded into the double-lug plate structures at two ends of the hinge point type support rod 20 respectively.
Preferably, the door frame body 10 includes an upper beam 10a and a lower beam 10b and two uprights 10c vertically connected between both ends of the upper beam 10a and the lower beam 10 b; one of the columns 10c is provided with a first support plate 11 at substantially the middle and lower portions thereof, and the other column 10c is provided with a second support plate 12 at substantially the middle portion thereof.
Preferably, the first support plate 11 and the second support plate 12 are fixed to the door frame 10 by welding at the manufacturing stage of the door frame 10.
Preferably, the weight plate 14 is a ring plate with a ring hole in the middle, and the diameter of the ring hole is approximately equal to the shaft diameter of the hinge point shaft 13.
The binding method based on the binding mechanism for the container crane door frame comprises the following operation steps:
the method comprises the following steps: the first support plate 11 and the second support plate 12 are correspondingly fixed to corresponding positions of the door frame body 10 in a welding mode in the manufacturing stage of the door frame body 10, so that the welding amount of high-altitude operation in the binding stage can be reduced; the first support plate 11 and the second support plate 12 correspondingly comprise a first positioning hole 11a and a second positioning hole 12a respectively, and the aperture of the first positioning hole 11a is equal to that of the second positioning hole 12a and is approximately equal to the shaft diameter of the hinge point shaft 13;
step two: roughly selecting a hinge point type supporting rod 20 with a corresponding length according to the distance between a first positioning hole 11a on the first supporting plate 11 and a second positioning hole 12a on the second supporting plate 12, wherein one end of the hinge point type supporting rod 20 is provided with a first hinge point hole 20a, the other end of the hinge point type supporting rod 20 is provided with a second hinge point hole 20b, the aperture of the first hinge point hole 20a is smaller than that of the second hinge point hole 20b, and the aperture of the first hinge point hole 20a is approximately equal to the shaft diameter of the hinge point shaft 13;
step three: one end of a hinge point type supporting rod 20 is overlapped with the first positioning hole 11a through a first hinge point hole 20a and is fixed on the first support plate 11 through a hinge point shaft 13, and the other end of the hinge point type supporting rod is overlapped with one second positioning hole 12a through a second hinge point hole 20b and is fixed on the second support plate 12 through a heavy plate 14 which is welded on the outer side of the second hinge point hole 20b in a matched mode through the hinge point shaft 13;
step four: after the use of the door frame is finished, the hinge point type stay bar 20 is detached from the door frame body 10 for standby next time, and the binding process only involves welding the heavy pound plate 14 relative to the outer side of the second hinge point hole 20b, so that the hinge point type stay bar 20 is less damaged during detachment, and the door frame can be continuously used.
Preferably, the first hinge point hole 20a at one end of the hinge point type brace 20 is a finished hole, and is completed by machining; the second hinge point hole 20b at the other end is a semi-finished hole and does not need machining.
Preferably, in the third step, after one end of the pivot point type brace 20 is overlapped with the first positioning hole 11a through the first pivot point hole 20a and fixed on the first support plate 11 by the pivot point shaft 13, the other end is overlapped with one of the second positioning holes 12a through the second pivot point hole 20b and overlapped with the heavy weight plate 14 on the upper and lower outer sides of the second pivot point hole 20b, then the pivot point shaft 13 is sleeved on the other end, the position of the heavy weight plate 14 relative to the second pivot point hole 20b is determined, and finally the heavy weight plate 14 is welded on the outer side of the second pivot point hole 20b relatively to make the pivot point type brace 20 be rigidly fixed connection with the door frame body 10.
Preferably, the hinge point shaft 13 is installed with shaft clamping plates 15 padded at both outer ends.
The invention provides a binding mechanism for a container crane door frame and a binding method thereof, wherein a large hinged point hole and a small hinged point hole are correspondingly arranged at two connecting ends of a hinged point type stay bar, one small hinged point hole is matched with a positioning hole on a support plate at one side of a door frame body and is further fixed by a hinged point shaft, one large hinged point hole is matched with a positioning hole on a support plate at the other side of the door frame body and is further welded and fixed by a hinged point shaft weighting plate, the specific length of the hinged point type stay bar can be adjusted in a certain range aiming at the distance between the two positioning holes at the side, namely the relative position of the large hinged point hole and the positioning hole at the end is adjusted, so that the precision requirement for processing the hinged point type stay bar can be reduced, the working efficiency is further improved, meanwhile, the universality of the hinged point type stay bar is improved, namely, the application of the binding mechanism is convenient for installing the hinged point type stay bars with different lengths within, repeatedly usable (mainly the welding volume is few, and it is few to dismantle the damage), it can also reduce the construction cycle of marine ligature simultaneously, has improved the operating efficiency, has reduced the manufacturing cost of enterprise.
In the description of the present invention, it is to be understood that the terms "upper", "middle", "lower", "inner", "outer", "first", "second", "vertical", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Although the embodiments of the present invention have been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and it should be understood by those skilled in the art that various modifications and variations can be made without inventive efforts by those skilled in the art based on the technical solution of the present invention.
Claims (9)
1. A binding mechanism used on a container crane door frame is characterized by comprising a door frame and a hinged point type support rod; the door frame is of a square frame structure and comprises a plurality of door frame bodies, and the hinge point type stay bar is connected in the door frame bodies;
a plurality of distributed first support plates are arranged on the inner side of one side of the door frame body, an integral second support plate is arranged on the inner side of the other side of the door frame body, each first support plate is provided with a first positioning hole, the second support plate is provided with a plurality of second positioning holes, and the diameter of each first positioning hole is equal to that of each second positioning hole and is equal to the shaft diameter of the hinge point shaft;
one end of the hinge point type stay bar is provided with a first hinge point hole, the other end of the hinge point type stay bar is provided with a second hinge point hole, the aperture of the first hinge point hole is smaller than that of the second hinge point hole, and the aperture of the first hinge point hole is equal to the shaft diameter of the hinge point shaft;
one end of the hinge point type supporting rod is overlapped with the first positioning hole through the first hinge point hole and is fixed on the first support plate through the hinge point shaft, the other end of the hinge point type supporting rod is overlapped with one of the second positioning holes through the second hinge point hole and is fixed on the second support plate through a heavy scale plate welded on the outer side of the second hinge point hole in a matched mode through the hinge point shaft, the heavy scale plate is a ring piece with a ring hole in the middle, the diameter of the ring hole is equal to the diameter of the hinge point shaft, and the heavy scale plate is welded on the outer side of the second hinge point hole.
2. The banding mechanism for container crane door frame as claimed in claim 1, wherein the number of said first support plate is equal to the number of said second positioning hole of said second support plate.
3. The binding mechanism for a door frame of a container crane as claimed in claim 1, wherein both ends of the pivot point type stay bar are formed into a double-lug plate structure extending in parallel up and down, and the first pivot point hole and the second pivot point hole are correspondingly formed in the double-lug plate structure at both ends of the pivot point type stay bar; the first support plate and the second support plate are both of a single-lug plate structure, and the first positioning hole and the second positioning hole are correspondingly and respectively arranged on the single-lug plate structures of the first support plate and the second support plate; the single lug plate structures of the first support plate and the second support plate are correspondingly and respectively embedded into the double lug plate structures at two ends of the hinge point type support rod.
4. The lashing mechanism for a door frame of a container crane according to claim 1, wherein the door frame body comprises an upper beam and a lower beam and two posts vertically connected between both ends of the upper beam and the lower beam; the upper part, the middle part and the lower part of one upright post are respectively provided with a first support plate, and the middle part of the other upright post is provided with a second support plate.
5. The lashing mechanism for a door frame of a container crane according to claim 1, wherein the first and second support plates are fixed to the door frame by welding.
6. A lashing method for lashing mechanisms on container crane door frames, characterized by comprising the following operating steps:
the method comprises the following steps: the first support plate and the second support plate are correspondingly fixed to corresponding positions of the door frame body in a welding mode in the manufacturing stage of the door frame body; the first support plate and the second support plate correspondingly and respectively comprise a first positioning hole and a second positioning hole, and the aperture of the first positioning hole is equal to that of the second positioning hole and is equal to the shaft diameter of the hinge point shaft;
step two: roughly selecting a hinge point type support rod with corresponding length according to the distance between a first positioning hole in the first support plate and a second positioning hole in the second support plate, wherein a first hinge point hole is formed in one end of the hinge point type support rod, a second hinge point hole is formed in the other end of the hinge point type support rod, the aperture of the first hinge point hole is smaller than that of the second hinge point hole, and the aperture of the first hinge point hole is equal to the shaft diameter of a hinge point shaft;
step three: one end of the hinge point type supporting rod is overlapped with the first positioning hole through the first hinge point hole and is fixed on the first support plate through a hinge point shaft, and the other end of the hinge point type supporting rod is overlapped with one of the second positioning holes through the second hinge point hole and is fixed on the second support plate through a heavy plate which is welded on the outer side of the second hinge point hole in a matched mode through the hinge point shaft;
step four: after the door frame is used, the hinged point type support rod is detached from the door frame body to be reserved next time.
7. The banding method for the banding mechanism on the door frame of the container crane as claimed in claim 6, characterized in that, the first hinge point hole of one end of said hinge point type brace rod is a finished hole, and is finished by machining; and the second hinge point hole at the other end is a semi-finished hole and does not need machining.
8. The method for binding the binding mechanism on the door frame of the container crane according to claim 6, wherein in the third step, one end of the pivot point type brace rod is overlapped with the first positioning hole through the first pivot point hole and fixed on the first support plate through the pivot point shaft, the other end of the pivot point type brace rod is overlapped with one of the second positioning holes through the second pivot point hole and overlapped with the heavy plate on the upper and lower outer sides of the second pivot point hole, the pivot point shaft is sleeved on the pivot point shaft, the position of the heavy plate relative to the second pivot point hole is determined, and finally the heavy plate is welded on the outer side of the second pivot point hole so that the pivot point type brace rod is rigidly and fixedly connected with the door frame body.
9. The banding method for the banding mechanism on the door frame of the container crane as claimed in claim 6, wherein when said hinge point shaft is installed, its both outer side ends are padded with the shaft clamping plates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810872406.7A CN108999537B (en) | 2018-08-02 | 2018-08-02 | Binding mechanism for container crane door frame and binding method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810872406.7A CN108999537B (en) | 2018-08-02 | 2018-08-02 | Binding mechanism for container crane door frame and binding method thereof |
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| CN108999537A CN108999537A (en) | 2018-12-14 |
| CN108999537B true CN108999537B (en) | 2020-06-09 |
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| CN110217696B (en) * | 2019-06-03 | 2020-10-27 | 上海振华重工(集团)股份有限公司 | Door frame assembly for container crane, door frame and splicing method |
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| CN202575714U (en) * | 2012-05-16 | 2012-12-05 | 新乡克瑞重型机械科技股份有限公司 | Plane truss portal crane |
| CN103924673B (en) * | 2014-05-04 | 2016-05-18 | 衡水鑫盛达新材料科技有限公司 | A kind of support node and construction method thereof of controlling spatial mesh structure accumulated error |
| CN207072755U (en) * | 2017-08-31 | 2018-03-06 | 上海振华重工(集团)股份有限公司 | One kind is used for underwater bearing pin and removes rocker device |
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