CN115536480A - Initiating explosive device casting molding device and process method thereof - Google Patents
Initiating explosive device casting molding device and process method thereof Download PDFInfo
- Publication number
- CN115536480A CN115536480A CN202211345344.7A CN202211345344A CN115536480A CN 115536480 A CN115536480 A CN 115536480A CN 202211345344 A CN202211345344 A CN 202211345344A CN 115536480 A CN115536480 A CN 115536480A
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- 238000000465 moulding Methods 0.000 title claims abstract description 31
- 239000002360 explosive Substances 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000005266 casting Methods 0.000 title claims abstract description 18
- 230000000977 initiatory effect Effects 0.000 title claims abstract description 18
- 230000008569 process Effects 0.000 title claims abstract description 14
- 239000003814 drug Substances 0.000 claims abstract description 25
- 239000007788 liquid Substances 0.000 claims abstract description 21
- 210000000988 bone and bone Anatomy 0.000 claims abstract description 13
- 238000007493 shaping process Methods 0.000 claims description 17
- 238000003825 pressing Methods 0.000 claims description 11
- 238000007711 solidification Methods 0.000 claims description 8
- 230000008023 solidification Effects 0.000 claims description 8
- 238000009827 uniform distribution Methods 0.000 claims description 5
- 230000009471 action Effects 0.000 claims description 3
- 238000011900 installation process Methods 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 238000003780 insertion Methods 0.000 claims 2
- 230000037431 insertion Effects 0.000 claims 2
- 238000004519 manufacturing process Methods 0.000 abstract description 11
- 230000007547 defect Effects 0.000 abstract description 4
- 210000000689 upper leg Anatomy 0.000 abstract description 3
- 230000009977 dual effect Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 abstract description 2
- 230000009467 reduction Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 6
- 238000010276 construction Methods 0.000 description 2
- 238000011982 device technology Methods 0.000 description 2
- 206010066054 Dysmorphism Diseases 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation 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
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
- C06B21/00—Apparatus or methods for working-up explosives, e.g. forming, cutting, drying
- C06B21/0033—Shaping the mixture
- C06B21/0058—Shaping the mixture by casting a curable composition, e.g. of the plastisol type
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses an initiating explosive device casting molding device, which comprises: the shell fixing assembly is used for placing a product shell; a pouring assembly for use in a pouring process; a form curing assembly for use in a forming process; the product shell is fixed in an assembly mode, so that the product shell is fixed quickly and conveniently; when the pouring, the society has the reposition of redundant personnel bone on the slide, shunts the slightly bigger medicine thigh volume of pouring, reduces the gassing, flows out through the tiny hole on the effluvium again, further shunts the liquid medicine, and the production of dual reduction bubble reduces the quality defect that the product produced because of the bubble from this, and the effect is very outstanding, and simultaneously, the reposition of redundant personnel of liquid medicine refines, and product quality after to is better.
Description
Technical Field
The invention relates to the technical field of technological equipment, in particular to a method for producing a casting forming initiating explosive device product with special-shaped requirements.
Background
The technology of initiating explosive devices is widely transferred to the civil field due to the excellent performance and function thereof, and is widely applied to national economic construction and daily life. One of the explosive device technologies is explosive forming assembly, and a certain civil explosive device is directly poured in a forming shell by adopting liquid explosive, and needs to be formed into a certain shape in the solidification process of the liquid explosive in the shell. The liquid medicine has high viscosity, if the amount of the poured medicine strands is slightly larger, bubbles are easy to generate, the poured medicine strands are solidified into special shapes, certain difficulty is caused in production, the product quality defects are more in production, and the production efficiency is low.
Disclosure of Invention
The invention provides an initiating explosive device casting molding device and a process method thereof, aiming at solving the problems of more quality defects and low production efficiency after production in the prior art.
The technical scheme of the invention is as follows: an initiating explosive device casting molding device, comprising:
the shell fixing assembly is used for placing a product shell;
the pouring assembly is used in the pouring process and comprises a hopper and a flower plate, one end of a wide opening of the hopper is connected through a plurality of support rods, the pouring assembly is detachably connected with the upper surface of the shell fixing assembly through the support rods, a hemispherical shunt bone is arranged in the middle of the flower plate, a plurality of outflow bodies in a circumferential array are arranged on the flower plate outside the shunt bone, and a plurality of fine flow holes penetrating through the flower plate and the outflow bodies are formed in the outflow bodies;
the shaping solidification subassembly, the shaping solidification subassembly is arranged in the forming process to use, the shaping solidification subassembly includes clamp plate and shaping piece, the shaping piece inserts the fixed subassembly upper end of casing, the clamp plate is located shaping piece upper end and can dismantle with the fixed subassembly of casing through bolt and nut and be connected.
As a further improvement of the technical scheme:
preferably, a rubber ring is arranged between the connecting positions of the hopper and the flower plate.
Preferably, the forming block is provided with a taking-out threaded hole.
Preferably, the shell fixing assembly comprises a base, long screws, a positioning ring and a core rod, the base and the positioning ring are distributed up and down and are connected through a plurality of long screws matched with bolts and nuts, a plurality of uniform distribution holes matched with the outflow body are formed in the positioning ring, and the detachable core rod is inserted into the middle of the positioning ring and is limited through a protrusion of an outer ring of the core rod.
Preferably, the base upper surface is provided with outer location step, position circle lower surface is provided with interior location step.
Preferably, the forming block is in a hollow cylindrical shape, a sliding groove is formed in the outer periphery of the forming block, and the sliding groove is matched with the cross bars between the adjacent equal-dividing holes.
Preferably, the outer sides of the flower plate and the positioning ring are provided with marking grooves.
Preferably, the core rod is provided with a taking-out through hole.
Preferably, a plurality of hanging rings are arranged on the upper surface of the shell fixing component.
In order to clearly show the operation process of the device for casting and curing molding the initiating explosive device technology of the product, the invention provides a process method of the initiating explosive device casting molding device, which comprises the following steps:
step1, fixing the product shell; the product shell is arranged on an outer positioning step of the base, the lower ends of the 4 long screws are inserted into the through holes of the base and then fixed by the washers and the nuts, the through holes of the positioning rings penetrate through the upper ends of the long screws, and the through holes are sleeved into the upper end of the product shell through the holes of the inner positioning step and then fixed by the washers and the nuts;
step2, mounting a pouring assembly; the flower plate of the pouring assembly faces downwards and is installed in corresponding holes which are uniformly distributed through the lower end of the stay bar and the positioning ring, and the flower plate and the marking groove of the positioning ring are aligned with each other in the installation process;
step3, pouring; the liquid medicine is injected from the upper opening of the hopper, is shunted under the action of the shunt bone and flows to the tiny flow hole of the outflow body, so that the liquid medicine flows into the product shell through the even division hole of the positioning ring until the liquid medicine in the product shell reaches a certain amount, and then the pouring is finished;
step4, assembling, disassembling, assembling and forming a curing assembly; taking down the pouring assembly, aligning the chute grooves of the forming blocks with the cross bars between the adjacent equal-dividing holes, inserting the forming blocks, wherein the inserting height of the forming blocks is determined by the length of the chute and the protrusion height of the core rod, pressing the forming blocks again by a pressing plate, and fixing the forming blocks, the core rod and the positioning ring through nuts and gaskets;
step5, unloading the parts to finish pouring; and curing according to the characteristics of the liquid medicine, carrying to a specified place through a hanging ring after curing, and sequentially disassembling the pressing plate, the molding block, the core rod, the positioning ring and the long screw rod, so that the product is cast and shaped.
Compared with the prior art, the invention has the following beneficial effects:
compared with the prior art, the product shell is fixed in an assembly mode, so that the product shell is fixed quickly and conveniently; in the pouring, the society has the reposition of redundant personnel bone on the slide, reposition of redundant personnel to the slightly bigger medicine thigh volume of pouring, reduce the gassing, flow out through the tiny hole on the effluvium again, further reposition of redundant personnel liquid medicine, the production of dual reduction bubble, reduce the quality defect that the product produced because of the bubble from this, the effect is very outstanding, and simultaneously, the reposition of redundant personnel of liquid medicine refines, to postpartum product quality better, the shaping piece has satisfied the production requirement of product dysmorphism type, a position circle of pouring and shaping sharing, need not to change the article of fixed shaping piece, practice thrift production steps.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic sectional view of a front view of a molded product;
FIG. 2 is a schematic top view of the formed product;
FIG. 3 is a schematic view of the overall apparatus of the casting process of the present invention;
FIG. 4 is a schematic view of the cage of the present invention;
FIG. 5 is a front view structural schematic diagram of the card of the present invention;
FIG. 6 is a side view schematic of the faceplate of the present invention;
FIG. 7 is a schematic view of the brace bar construction of the present invention;
FIG. 8 is a schematic view of the overall apparatus structure of the mold curing step of the present invention;
FIG. 9 is a schematic view of a building block of the present invention.
Reference numerals: 1. a base; 2. a long screw; 3. positioning rings; 4. a core bar; 5. holes are evenly distributed; 6. a hopper; 7. a pattern plate; 8. a stay bar; 9. a rubber ring; 10. shunting bone; 11. an effluent; 12. a hoisting ring; 13. forming a block; 14. pressing a plate; 15. taking out the threaded hole; 16. a chute; 17. marking a groove; 18. and taking out the through hole.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be understood that the terms "front", "back", "left", "right", "up", "down", and the like indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements indicated by the terms must have specific orientations, be constructed and operated in specific orientations, and therefore, should not be construed as limiting the present invention.
The invention provides the following technical scheme:
as shown in fig. 1, is a cross-sectional structure diagram of a front view of a molded product, the interior of which is a liquid medicine, and the exterior of which is a product housing, as shown in fig. 2, is a top view of the molded product.
Referring to the attached figure 3, for the structure diagram of the whole device in the pouring process, the product shell is arranged on the positioning step outside the base 1, and then the lower ends of the 4 long screws 2 are inserted into the through holes of the base 1 and fixed by gaskets and nuts. The through hole of the locating ring 3 passes through the upper end of the long screw rod 2, is sleeved into a product shell through a locating step hole and then is fixed by a gasket and a nut, the core rod 4 is inserted into a central hole of the locating ring 3, 2 lifting rings 12 are installed above the locating ring 3 in a threaded connection mode, and the whole device is convenient to carry in production, wherein the locating ring 3 is shown in the attached drawing 4, the central hole of the core rod 4 is arranged in the middle of the locating ring 3, and three fan-shaped uniform distribution holes 5 in a circumferential array are formed in the outer side of the central hole;
fill 6, card 7 passes through 3 vaulting poles 8, the packing ring, the nut is installed together, rubber circle 9 is installed and is being fought 6, between the card 7, 3 corresponding holes of evenly distributed of position circle 3 are inserted to the tip part under the rethread vaulting pole 8, vaulting pole 8 is as shown in figure 6, during the installation, guarantee that card 7 and position circle 3's mark position unanimity, be provided with mark groove 17 on card 7 and position circle 3, as shown in figure 5 and figure 6, be the structure diagram of card 7, card 7 is formed by reposition of redundant personnel bone 10 and the welding of effuser 11, reposition of redundant personnel bone 10 is the hemisphere type, for preventing that the medicine thigh volume of pouring is big easily to produce the bubble slightly, effuser 11 has a plurality of tiny holes, be the hole 5 scope distribution of equalling equally of position circle 3, reposition of redundant personnel is equipped with bone 10, guarantee that the liquid medicine that viscosity is big smoothly pours into the shaping product shell through the tiny hole of effuser 11 and the hole 5 of equalling equally of position circle 3.
As shown in fig. 8, for the structure diagram of the whole device in the molding and curing step, the fixing structure of the product housing is unchanged, the molding block 13 slides on the horizontal bar between the adjacent equally-divided holes 5 through the sliding groove 16, as shown in fig. 9, which is a schematic structural diagram of the molding block 13, three equally-divided parts of the molding block 13 are inserted into the corresponding equally-divided holes 5 of the positioning ring 3, the assembling depth of the convex positioning molding block 13 on the core rod 4 is determined by the depth length of the sliding groove 16, the molding block 13 is pressed by the pressing plate 14, the molding block 13, the core rod 4 and the positioning ring 3 are fixed through bolts, nuts and washers, the end face of the molding block 13 is provided with a taking-out threaded hole 15, and the core rod 4 is provided with a taking-out through hole 18, which is designed to facilitate taking out the curing and forming medicine by using a general-purpose tool.
The application process of the invention is as follows:
1. fixing a product shell; a product shell is arranged on an outer positioning step of a base 1, the lower ends of 4 long screws 2 are inserted into through holes of the base 1 and then fixed by a gasket and a nut, the through holes of a positioning ring 3 penetrate through the upper end of the long screws 2, and are sleeved into the upper end of a product shell through the holes of the inner positioning step and then fixed by the gasket and the nut;
2. mounting a pouring component; the flower plate 7 of the pouring assembly faces downwards and is installed in corresponding holes evenly distributed in the positioning ring 3 through the lower end of the support rod 8, and the flower plate 7 is aligned with the mark groove 17 of the positioning ring 3 in the installation process;
3. pouring; the liquid medicine is injected from the upper opening of the bucket 6, is shunted under the action of the shunt bone 10 and flows to the fine flow hole 12 of the outflow body 11, so that the liquid medicine flows into the product shell through the uniform distribution hole 5 of the positioning ring 3 until the liquid medicine in the product shell reaches a certain amount, and then the pouring is finished;
4. assembling, disassembling and assembling the molded curing assembly; taking down the pouring assembly, aligning the chute 16 of the forming block 13 with the horizontal bar between the adjacent equal-dividing holes 5, inserting the forming block 13, wherein the inserting height of the forming block 13 is determined by the length of the chute 16 and the protruding height of the core rod 4, pressing the forming block 13 by the pressing plate 14 again, and fixing the forming block 13, the core rod 4 and the positioning ring 3 by the nut and the gasket;
5. unloading the parts to finish pouring; and (3) solidifying according to the characteristics of the liquid medicine, carrying to a specified place through the hanging ring 12 after solidification, and sequentially disassembling the pressing plate 14, the forming block 13, the core bar 4, the positioning ring 3 and the long screw rod 2, so that the product is cast and shaped.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The utility model provides an initiating explosive device casting molding device which characterized in that includes:
the shell fixing assembly is used for placing a product shell;
the pouring assembly is used in the pouring process and comprises a hopper (6) and a flower plate (7), one end of a wide opening of the hopper (6) is connected through a plurality of support rods (8), the pouring assembly is detachably connected with the upper surface of the shell fixing assembly through the support rods (8), a hemispherical shunt bone (10) is arranged in the middle of the flower plate (7), a plurality of outflow bodies (11) in a circumferential array are arranged on the flower plate (7) on the outer side of the shunt bone (10), and a plurality of fine flow holes penetrating through the flower plate (7) and the outflow bodies (11) are formed in the outflow bodies (11);
the shaping solidification subassembly, the shaping solidification subassembly is arranged in the shaping in-process and uses, the shaping solidification subassembly includes clamp plate (14) and shaping piece (13), shaping piece (13) insert the fixed subassembly upper end of casing, clamp plate (14) are located shaping piece (13) upper end and can dismantle with the fixed subassembly of casing through bolt and nut and be connected.
2. The initiating explosive device casting molding device according to claim 1, characterized in that a rubber ring (9) is arranged between the connecting positions of the hopper (6) and the pattern plate (7).
3. The pyrotechnic casting molding apparatus according to claim 1, wherein the molding block (13) is provided with a take-out screw hole (15).
4. The initiating explosive device casting molding device according to claim 1, wherein the shell fixing assembly comprises a base (1), long screws (2), a locating ring (3) and a core rod (4), the base (1) and the locating ring (3) are distributed up and down and are connected through a plurality of long screws (2) matched with bolts and nuts, a plurality of uniform distribution holes (5) matched with the outflow body (11) are formed in the locating ring (3), and the detachable core rod (4) is inserted into the middle of the locating ring (3) and is limited by the protrusion of the outer ring of the core rod (4).
5. The initiating explosive device casting molding device according to claim 4, characterized in that, the upper surface of the base (1) is provided with an outer positioning step, and the lower surface of the positioning ring (3) is provided with an inner positioning step.
6. An initiating explosive device pouring moulding device according to claim 4, characterized in that the moulding block (13) is hollow cylindrical and is provided with a runner (16) on the outer periphery, and the runner (16) is matched with a cross bar between adjacent equalizing holes (5).
7. The initiating explosive casting device according to claim 4, wherein the outer sides of the pattern plate (7) and the positioning ring (3) are provided with marking grooves (17).
8. A initiating explosive device casting molding device according to claim 4, characterized in that the core rod (4) is provided with a taking out through hole (18).
9. The initiating explosive device casting molding device according to any one of claims 1 to 8, characterized in that a plurality of hanging rings (12) are arranged on the upper surface of the shell fixing component.
10. A process method of an initiating explosive device casting molding device is characterized by comprising the following steps:
step1, fixing the product shell; the product shell is arranged on an outer positioning step of a base (1), the lower ends of 4 long screw rods (2) are inserted into through holes of the base (1) and then fixed by a gasket and a nut, the through holes of a positioning ring (3) penetrate through the upper end of the long screw rods (2), and are sleeved into the upper end of a product shell through the inner positioning step holes and then fixed by the gasket and the nut;
step2, mounting a pouring assembly; the flower plate (7) of the pouring assembly faces downwards and is installed in corresponding holes which are uniformly distributed through the lower end of the support rod (8) and the positioning ring (3), and the flower plate (7) is aligned with the marking groove (17) of the positioning ring (3) in the installation process;
step3, pouring; the liquid medicine is injected from an upper opening of the hopper (6), is shunted under the action of the shunt bone (10) and flows to a fine flow hole of the outflow body (11), so that the liquid medicine flows into the product shell through the uniform distribution hole (5) of the positioning ring (3) until the liquid medicine in the product shell reaches a certain amount, and then the pouring is finished;
step4, assembling, disassembling, assembling and forming a curing assembly; taking down the pouring assembly, aligning a chute (16) of the molding block (13) with a transverse bar between adjacent equal-dividing holes (5) for insertion, determining the insertion height of the molding block (13) by the length of the chute (16) and the projection height of the core rod (4), pressing the molding block (13) by a pressing plate (14) again, and fixing the molding block (13), the core rod (4) and the positioning ring (3) by a nut and a gasket;
step5, unloading the parts to finish pouring; and curing is carried out according to the characteristics of the liquid medicine, after the curing is finished, the product is conveyed to a specified place through a hanging ring (12), and the pressing plate (14), the forming block (13), the core rod (4), the positioning ring (3) and the long screw (2) are sequentially disassembled, so that the product is cast and shaped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211345344.7A CN115536480B (en) | 2022-10-31 | 2022-10-31 | Initiating explosive device casting forming device and process method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211345344.7A CN115536480B (en) | 2022-10-31 | 2022-10-31 | Initiating explosive device casting forming device and process method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115536480A true CN115536480A (en) | 2022-12-30 |
| CN115536480B CN115536480B (en) | 2024-05-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202211345344.7A Active CN115536480B (en) | 2022-10-31 | 2022-10-31 | Initiating explosive device casting forming device and process method thereof |
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| Country | Link |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT192122B (en) * | 1945-11-23 | 1957-09-25 | Siemens Ag | Device for degassing liquid melts |
| GB1344773A (en) * | 1971-01-18 | 1974-01-23 | Ici Australia Ltd | Method and apparatus |
| US3807272A (en) * | 1972-01-25 | 1974-04-30 | Aerojet General Co | Apparatus for forming rocket motors |
| JP2004188825A (en) * | 2002-12-12 | 2004-07-08 | Toshimichi Nishizawa | Injection mold |
| WO2006054291A2 (en) * | 2004-11-16 | 2006-05-26 | Rafael - Armament Development Authority Ltd. | Highly filled, high-viscosity paste charge, and method and device for production thereof |
| CN209953774U (en) * | 2019-05-13 | 2020-01-17 | 厦门美托精密模具有限公司 | Economical pouring mechanism |
| CN211990878U (en) * | 2020-04-08 | 2020-11-24 | 苏州优尼昂精密金属制造有限公司 | Gating system of center gate of die-casting die |
| CN218778872U (en) * | 2022-10-31 | 2023-03-31 | 江南工业集团有限公司 | Initiating explosive device casting molding device |
-
2022
- 2022-10-31 CN CN202211345344.7A patent/CN115536480B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT192122B (en) * | 1945-11-23 | 1957-09-25 | Siemens Ag | Device for degassing liquid melts |
| GB1344773A (en) * | 1971-01-18 | 1974-01-23 | Ici Australia Ltd | Method and apparatus |
| US3807272A (en) * | 1972-01-25 | 1974-04-30 | Aerojet General Co | Apparatus for forming rocket motors |
| JP2004188825A (en) * | 2002-12-12 | 2004-07-08 | Toshimichi Nishizawa | Injection mold |
| WO2006054291A2 (en) * | 2004-11-16 | 2006-05-26 | Rafael - Armament Development Authority Ltd. | Highly filled, high-viscosity paste charge, and method and device for production thereof |
| CN209953774U (en) * | 2019-05-13 | 2020-01-17 | 厦门美托精密模具有限公司 | Economical pouring mechanism |
| CN211990878U (en) * | 2020-04-08 | 2020-11-24 | 苏州优尼昂精密金属制造有限公司 | Gating system of center gate of die-casting die |
| CN218778872U (en) * | 2022-10-31 | 2023-03-31 | 江南工业集团有限公司 | Initiating explosive device casting molding device |
Non-Patent Citations (1)
| Title |
|---|
| 王志华;: "塑料注射模具浇注系统的设计浅析", 轻工科技, no. 05, 2 May 2017 (2017-05-02), pages 35 - 36 * |
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| CN115536480B (en) | 2024-05-03 |
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