CN113154963A - Magnesium alloy gun ammunition box and manufacturing method thereof - Google Patents
Magnesium alloy gun ammunition box and manufacturing method thereof Download PDFInfo
- Publication number
- CN113154963A CN113154963A CN202110571614.5A CN202110571614A CN113154963A CN 113154963 A CN113154963 A CN 113154963A CN 202110571614 A CN202110571614 A CN 202110571614A CN 113154963 A CN113154963 A CN 113154963A
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- magnesium alloy
- box
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- gun
- die
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- 229910000861 Mg alloy Inorganic materials 0.000 title claims abstract description 34
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 claims abstract description 21
- 230000002265 prevention Effects 0.000 claims abstract description 8
- 239000000843 powder Substances 0.000 claims description 41
- 238000005507 spraying Methods 0.000 claims description 19
- 238000004512 die casting Methods 0.000 claims description 18
- 238000003723 Smelting Methods 0.000 claims description 12
- 239000007921 spray Substances 0.000 claims description 11
- 230000008569 process Effects 0.000 claims description 9
- 238000007689 inspection Methods 0.000 claims description 7
- 230000009471 action Effects 0.000 claims description 6
- 238000004806 packaging method and process Methods 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 6
- 238000004458 analytical method Methods 0.000 claims description 4
- 230000005684 electric field Effects 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 3
- 238000002474 experimental method Methods 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 238000003754 machining Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 238000007745 plasma electrolytic oxidation reaction Methods 0.000 claims description 3
- 230000001846 repelling effect Effects 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- 230000008878 coupling Effects 0.000 claims 2
- 238000010168 coupling process Methods 0.000 claims 2
- 238000005859 coupling reaction Methods 0.000 claims 2
- 230000006870 function Effects 0.000 abstract description 2
- 238000003491 array Methods 0.000 description 2
- 239000011152 fibreglass Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000012946 outsourcing Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B39/00—Packaging or storage of ammunition or explosive charges; Safety features thereof; Cartridge belts or bags
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
- B05D1/04—Processes for applying liquids or other fluent materials performed by spraying involving the use of an electrostatic field
- B05D1/06—Applying particulate materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D31/00—Cutting-off surplus material, e.g. gates; Cleaning and working on castings
- B22D31/002—Cleaning, working on castings
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/026—Anodisation with spark discharge
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/30—Anodisation of magnesium or alloys based thereon
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B39/00—Packaging or storage of ammunition or explosive charges; Safety features thereof; Cartridge belts or bags
- F42B39/14—Explosion or fire protection arrangements on packages or ammunition
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B39/00—Packaging or storage of ammunition or explosive charges; Safety features thereof; Cartridge belts or bags
- F42B39/26—Packages or containers for a plurality of ammunition, e.g. cartridges
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
Abstract
The invention belongs to the technical field of gun ammunition boxes and discloses a magnesium alloy gun ammunition box and a manufacturing method thereof, wherein the magnesium alloy gun ammunition box is provided with a box body, the left side of the box body is provided with a left side plate, and the right side of the box body is provided with a right side plate; the inside rear bracket that is provided with the back fire prevention frame interval of box, the inside front bracket that is provided with preceding fire prevention frame interval of box. The inner side of the left side plate is provided with a rear fireproof frame, and the rear fireproof frame is connected with the box body through a connecting bolt. The fire prevention frame before the inboard of right side board is provided with, and the box lower extreme is provided with the bottom plate, and the box upside is provided with the upper cover plate. The magnesium alloy electric control box shell has the advantages of light weight, high strength, signal shielding, interference resistance and the like, has the functions of fixing, transporting and protecting shells, and solves the problems of simple structure, heavy volume, more complicated production procedures, heavier resource consumption and the like of the existing military ammunition box.
Description
Technical Field
The invention belongs to the technical field of gun ammunition boxes, and particularly relates to a magnesium alloy gun ammunition box and a manufacturing method thereof.
Background
At present, military ammunition boxes are widely known to have various structures, and the military ammunition boxes have two types, namely a metal structure packaging box and a glass fiber reinforced plastic structure packaging box, which have different structural forms. The metal structure packing box: low anti-buffer performance, heavy box body, inconvenient daily operation and transportation and the like. Packing box of glass fiber reinforced plastic structure: the structure is a split structure, the safety performance is unstable, and the production efficiency is low, the volume is heavy and the like. For military use ammunition box of two kinds of above structures, box simple structure, the volume is heavy, and manufacturing procedure is comparatively loaded down with trivial details, and the resource consumes heavier scheduling problem.
Through the above analysis, the problems and defects of the prior art are as follows: the existing military ammunition box has the advantages of simple box body structure, heavy volume, more complicated production procedures and heavier resource consumption.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a magnesium alloy cannonball box and a manufacturing method thereof.
The invention is realized in such a way that the magnesium alloy cannonball box is provided with a box body;
the left side of the box body is provided with a left side plate, and the right side of the box body is provided with a right side plate;
the inside rear bracket that is provided with the back fire prevention frame interval of box, the inside front bracket that is provided with preceding fire prevention frame interval of box.
Furthermore, the inner side of the left side plate is provided with a rear fireproof frame, and the rear fireproof frame is connected with the box body through a connecting bolt.
Further, a front fireproof frame is arranged on the inner side of the right side plate.
Further, the lower end of the box body is provided with a bottom plate, and the upper side of the box body is provided with an upper cover plate.
Further, the front support and the rear bracket are arranged at intervals.
Furthermore, the box body is connected with the front bracket connecting cover and the rear bracket connecting cover.
Another object of the present invention is to provide a method for manufacturing a magnesium alloy gun magazine of the magnesium alloy gun magazine, wherein the method for manufacturing a magnesium alloy gun magazine comprises:
smelting corresponding materials of the magnesium alloy gun magazine, carrying out chemical analysis in the smelting process, and controlling parameters in the smelting process;
putting the smelting liquid into a corresponding die, and performing die-casting and trial production; the product is tested on the experimental product through a physical experiment;
carrying out die-casting production according to the inspection result; performing finish machining on a product produced by die casting, and inspecting;
performing micro-arc oxidation on a product produced by die casting, spraying powder, and performing quality inspection after the powder spraying is finished;
and after the quality of the sprayed powder is qualified, assembling, detecting the quality of the whole product, and packaging and warehousing.
Further, the powder spraying specific process is as follows:
placing the die-casting product in front of a spray gun, spraying powder by using electrostatic powder, and forming a high-voltage corona discharge electric field between the die-casting product and the spray gun;
when the powder particles are sprayed out from the nozzle of the spray gun and pass through a discharge region, a large amount of electrons are complemented and become particles with negative electricity;
under the action of electrostatic attraction, the workpiece is adsorbed to the workpiece with positive charges;
when the powder is attached to a certain thickness, the action of like charges repelling each other can occur, and the powder can not be adsorbed any more, so that the thickness of the powder layer of each part is uniform, and then the powder layer is leveled into a uniform film layer after being heated, baked and cured.
Further, the resistivity of the powder is 1010-1016 ohm/cm, and the spraying powder amount is controlled within the range of 50 g/min to 1000 g/min at the spraying starting stage.
Furthermore, the powder spraying distance is controlled to be 10-25 cm away from the workpiece, and is determined by the form of a spray gun.
By combining all the technical schemes, the invention has the advantages and positive effects that: the magnesium alloy electric control box shell has the advantages of light weight, high strength, signal shielding, interference resistance and the like, has the functions of fixing, transporting and protecting shells, and solves the problems of simple structure, heavy volume, more complicated production procedures, heavier resource consumption and the like of the existing military ammunition box.
Drawings
Fig. 1 is a schematic structural diagram of a magnesium alloy artillery shell case provided by an embodiment of the invention.
Fig. 2 is a schematic view of an internal structure of a magnesium alloy artillery shell case provided by an embodiment of the invention.
In the figure: 1. a base plate; 2. a left side plate; 3. a right side plate; 4. an upper cover plate; 5. a rear fire rack; 6. a rear bracket; 7. a front bracket; 8. a front fire rack; 9. a connecting screw; 10. the rear bracket is connected with the cover; 11. the front bracket is connected with the cover.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Aiming at the problems in the prior art, the invention provides a magnesium alloy artillery shell case and a manufacturing method thereof, and the invention is described in detail below with reference to the accompanying drawings.
Those skilled in the art of magnesium alloy artillery cases provided by the present invention may also perform other steps, and the magnesium alloy artillery case provided by the present invention in fig. 1 is merely one specific example.
As shown in fig. 1-2, the magnesium alloy artillery case provided by the embodiment of the invention is provided with a case body, a bottom plate 1 is arranged at the lower end of the case body, a left side plate 2 is arranged at the left side of the case body, a right side plate 3 is arranged at the right side of the case body, and an upper cover plate 4 is arranged at the upper side of the case body.
The inner side of the left side plate 2 of the box body is provided with a rear fireproof frame 5, and the rear fireproof frame 5 is connected with the box body through a connecting bolt 9; the box right side is provided with right side board 3, and 3 inboards on the right side board are provided with preceding fire prevention frame 8.
A rear bracket 6 is arranged in the box body and at a distance from the rear fireproof frame 5, a front bracket 7 is arranged in the box body and at a distance from the front fireproof frame 8, and the front bracket 7 and the rear bracket 6 are arranged at an adjacent distance; the box is connected with a front bracket connecting cover 11 and the box is connected with a rear bracket connecting cover 10.
The method for manufacturing the magnesium alloy cannonball box provided by the embodiment of the invention comprises the following steps:
smelting corresponding materials of the magnesium alloy gun magazine, carrying out chemical analysis in the smelting process, and controlling parameters in the smelting process;
putting the smelting liquid into a corresponding die, and performing die-casting and trial production; the product is tested on the experimental product through a physical experiment;
carrying out die-casting production according to the inspection result; performing finish machining on a product produced by die casting, and inspecting;
performing micro-arc oxidation on a product produced by die casting, spraying powder, and performing quality inspection after the powder spraying is finished;
and after the quality of the sprayed powder is qualified, assembling, detecting the quality of the whole product, and packaging and warehousing.
The specific process of powder spraying provided by the embodiment of the invention is as follows:
placing the die-casting product in front of a spray gun, spraying powder by using electrostatic powder, and forming a high-voltage corona discharge electric field between the die-casting product and the spray gun;
when the powder particles are sprayed out from the nozzle of the spray gun and pass through a discharge region, a large amount of electrons are complemented and become particles with negative electricity;
under the action of electrostatic attraction, the workpiece is adsorbed to the workpiece with positive charges;
when the powder is attached to a certain thickness, the action of like charges repelling each other can occur, and the powder can not be adsorbed any more, so that the thickness of the powder layer of each part is uniform, and then the powder layer is leveled into a uniform film layer after being heated, baked and cured.
Further, the resistivity of the powder is 1010-1016 ohm/cm, and the spraying powder amount is controlled within the range of 50 g/min to 1000 g/min at the spraying starting stage.
The method for outsourcing the accessories of the magnesium alloy cannonball box provided by the embodiment of the invention comprises the following steps: 1. selecting the type of the accessory; 2. inspecting a sample; 3. placing an order; 4. warehousing and inspection; 5. taking out of the warehouse; 13. assembling; 14. checking; 15. packaging; 16. and (7) warehousing.
In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", 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 and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
It should be noted that the embodiments of the present invention can be realized by hardware, software, or a combination of software and hardware. The hardware portion may be implemented using dedicated logic; the software portions may be stored in a memory and executed by a suitable instruction execution system, such as a microprocessor or specially designed hardware. Those skilled in the art will appreciate that the apparatus and methods described above may be implemented using computer executable instructions and/or embodied in processor control code, such code being provided on a carrier medium such as a disk, CD-or DVD-ROM, programmable memory such as read only memory (firmware), or a data carrier such as an optical or electronic signal carrier, for example. The apparatus and its modules of the present invention may be implemented by hardware circuits such as very large scale integrated circuits or gate arrays, semiconductors such as logic chips, transistors, or programmable hardware devices such as field programmable gate arrays, programmable logic devices, etc., or by software executed by various types of processors, or by a combination of hardware circuits and software, e.g., firmware.
The above description is only for the purpose of illustrating the present invention and the appended claims are not to be construed as limiting the scope of the invention, which is intended to cover all modifications, equivalents and improvements that are within the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A magnesium alloy gun barrel box, characterized in that, magnesium alloy gun barrel box is provided with:
a box body;
the left side of the box body is provided with a left side plate, and the right side of the box body is provided with a right side plate;
the inside rear bracket that is provided with the back fire prevention frame interval of box, the inside front bracket that is provided with preceding fire prevention frame interval of box.
2. The magnesium alloy gun case according to claim 1, wherein a rear fire-proof frame is provided inside the left side plate, and the rear fire-proof frame is connected to the case body by a connecting bolt.
3. The magnesium alloy gun case according to claim 1, wherein a front fireproof frame is provided inside the right side plate.
4. The magnesium alloy gun case according to claim 1, wherein a bottom plate is provided at a lower end of the case body, and an upper cover plate is provided at an upper side of the case body.
5. The magnesium alloy gun case of claim 1, wherein the front cradle is spaced adjacent to the rear cradle.
6. The magnesium alloy gun case according to claim 1, wherein the case body is coupled to a front bracket coupling cover, and the case body is coupled to a rear bracket coupling cover.
7. A method for manufacturing a magnesium alloy gun case according to any one of claims 1 to 6, comprising:
smelting corresponding materials of the magnesium alloy gun magazine, carrying out chemical analysis in the smelting process, and controlling parameters in the smelting process;
putting the smelting liquid into a corresponding die, and performing die-casting and trial production; the product is tested on the experimental product through a physical experiment;
carrying out die-casting production according to the inspection result; performing finish machining on a product produced by die casting, and inspecting;
performing micro-arc oxidation on a product produced by die casting, spraying powder, and performing quality inspection after the powder spraying is finished;
and after the quality of the sprayed powder is qualified, assembling, detecting the quality of the whole product, and packaging and warehousing.
8. The method for manufacturing the magnesium alloy gun case according to claim 7, wherein the powder spraying is carried out in the following specific process:
placing the die-casting product in front of a spray gun, spraying powder by using electrostatic powder, and forming a high-voltage corona discharge electric field between the die-casting product and the spray gun;
when the powder particles are sprayed out from the nozzle of the spray gun and pass through a discharge region, a large amount of electrons are complemented and become particles with negative electricity;
under the action of electrostatic attraction, the workpiece is adsorbed to the workpiece with positive charges;
when the powder is attached to a certain thickness, the action of like charges repelling each other can occur, and the powder can not be adsorbed any more, so that the thickness of the powder layer of each part is uniform, and then the powder layer is leveled into a uniform film layer after being heated, baked and cured.
9. The method for manufacturing a magnesium alloy gun magazine as set forth in claim 8, wherein the resistivity of the powder is 1010 to 1016 ohm/cm, and the amount of the powder sprayed is controlled in the range of 50 g/min to 1000 g/min at the start of spraying.
10. The method for manufacturing a magnesium alloy gun shell case according to claim 8, wherein the powder spraying distance is controlled to be 10 to 25 cm from the workpiece, which is determined by the form of the spray gun.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110571614.5A CN113154963A (en) | 2021-05-25 | 2021-05-25 | Magnesium alloy gun ammunition box and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110571614.5A CN113154963A (en) | 2021-05-25 | 2021-05-25 | Magnesium alloy gun ammunition box and manufacturing method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113154963A true CN113154963A (en) | 2021-07-23 |
Family
ID=76877345
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110571614.5A Pending CN113154963A (en) | 2021-05-25 | 2021-05-25 | Magnesium alloy gun ammunition box and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113154963A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001048896A1 (en) * | 1999-12-28 | 2001-07-05 | Alstom | Method for producing a high-quality insulation of electric conductors or conductor bundles of rotating electric machines by means of thermal spraying |
| US20050269856A1 (en) * | 2004-06-07 | 2005-12-08 | Jae Joong Kim | Seat back frame and method of manufacturing the same |
| WO2013078960A1 (en) * | 2011-11-28 | 2013-06-06 | Men Hongli | Fireproof waterproof storage box |
| CN205872756U (en) * | 2016-08-02 | 2017-01-11 | 威海光威复合材料股份有限公司 | Shell packing box |
| CN206634524U (en) * | 2017-04-14 | 2017-11-14 | 威海光威复合材料股份有限公司 | Composite packing case for explosives |
| CN208199232U (en) * | 2018-05-22 | 2018-12-07 | 安徽远帆包装工程有限公司 | One kind exempting from stifling packing case |
| CN111141185A (en) * | 2020-01-21 | 2020-05-12 | 宜晨虹 | Multifunctional ammunition packing box |
-
2021
- 2021-05-25 CN CN202110571614.5A patent/CN113154963A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001048896A1 (en) * | 1999-12-28 | 2001-07-05 | Alstom | Method for producing a high-quality insulation of electric conductors or conductor bundles of rotating electric machines by means of thermal spraying |
| US20050269856A1 (en) * | 2004-06-07 | 2005-12-08 | Jae Joong Kim | Seat back frame and method of manufacturing the same |
| WO2013078960A1 (en) * | 2011-11-28 | 2013-06-06 | Men Hongli | Fireproof waterproof storage box |
| CN205872756U (en) * | 2016-08-02 | 2017-01-11 | 威海光威复合材料股份有限公司 | Shell packing box |
| CN206634524U (en) * | 2017-04-14 | 2017-11-14 | 威海光威复合材料股份有限公司 | Composite packing case for explosives |
| CN208199232U (en) * | 2018-05-22 | 2018-12-07 | 安徽远帆包装工程有限公司 | One kind exempting from stifling packing case |
| CN111141185A (en) * | 2020-01-21 | 2020-05-12 | 宜晨虹 | Multifunctional ammunition packing box |
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| PB01 | Publication | ||
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Application publication date: 20210723 |