CN103888858A - Loudspeaker box with LED lamps - Google Patents
Loudspeaker box with LED lamps Download PDFInfo
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- CN103888858A CN103888858A CN201410111870.6A CN201410111870A CN103888858A CN 103888858 A CN103888858 A CN 103888858A CN 201410111870 A CN201410111870 A CN 201410111870A CN 103888858 A CN103888858 A CN 103888858A
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- buckle
- led lamp
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Abstract
The invention belongs to the technical field of loudspeaker boxes, and relates to a loudspeaker, in particular to a loudspeaker box with LED lamps. The loudspeaker box with the LED lamps comprises a box body and a box cover installed on the box body, a high pitch port is formed in the box cover, a plurality of installing holes are formed in the high pitch port, the LED lamps penetrate through the installing holes in a one-to-one corresponding mode, an LED board is electrically connected to a circuit board, and the circuit board is installed on the box cover. The box body comprises a box top and a box bottom, the box top is provided with a plurality of buckles protruding out of the box top, clamping grooves are formed in the box bottom, and the buckles can be buckled in the clamping grooves. The buckles are made of plastic composite materials, and the plastic composite materials specifically comprise, by weight, 80-100 parts of polyformaldehyde, 40-50 parts of polyurethane, 5-15 parts of flexibilizer, 3-5 parts of abrasion resisting agent, 5-8 parts of compatilizer, 3-5 parts of antistatic agent and 5-10 parts of antioxidant. The loudspeaker box is attractive and decent, notches of the buckles are high in impact strength, the buckles are good in tenacity, and the buckles are used in cooperation with the clamping grooves, so that enable the loudspeaker box is not prone to disengaging.
Description
Technical field
The invention belongs to loudspeaker techniques field, relate to a kind of audio amplifier, particularly a kind of audio amplifier with LED lamp.
Background technology
Chinese patent CN202143191U has announced a kind of audio amplifier with lamp decoration, and this audio amplifier comprises sound box, in the front panel of casing, is provided with loudspeaker, is provided with lamp decoration at casing front panel or loudspeaker outer ring, and lamp decoration is by governor circuit control.Wherein, lamp decoration is that LED lamp is altered, and is arranged in the form of a ring on front panel or is around in loudspeaker outer ring.LED lamp is altered to be divided into and is replaced glittering or according to glittering some groups successively of certain rules, every group comprises multiple LED lamps by governor circuit.For the ease of installing, LED lamp is altered and is fixed on a ring-type installing rack, and this installing rack is directly fixed on front panel or loudspeaker.
Above-mentioned audio amplifier is installed underaction at LED lamp, simultaneously LED lamp alter be divided into replace by governor circuit glittering or according to glittering some groups successively of certain rules, glimmer single, monnolithic case is attractive in appearance not, sometimes need two audio amplifiers to be superimposed while use, owing to there is no jockey, the audio amplifier being superimposed easily comes off and breaks.In addition,, in prior art, the buckle material on audio amplifier is single nylon 6 resin material.The notch impact strength of nylon 6 is lower, notch impact strength is less than 5, the buckle toughness of making is poor, nylon 6 is easily moisture absorption in air, after moisture absorption, make product size poor stability, that makes with nylon 6 is buckled in connection procedure, and while being subject to the extruding of draw-in groove, easy embrittlement damages, after connection because of change in size cause connect insecure.
Summary of the invention
The object of the invention is to have the problems referred to above for existing technology, proposed a kind of flexible installation, good looking appearance, the audio amplifier with LED lamp simple in structure.
Object of the present invention can realize by following technical proposal: a kind of audio amplifier with LED lamp, comprise casing and be arranged on the case lid on casing, on case lid, be provided with high pitch mouth, it is characterized in that, on described high pitch mouth, be provided with some installing holes, in described installing hole, correspondence is interspersed with LED lamp one by one, described LED board is electrically connected to wiring board, described wiring board is arranged on case lid, at the bottom of described casing comprises case top and case, described case top is provided with some buckles and outstanding case top, at the bottom of described case, be provided with draw-in groove, described buckle can buckle into draw-in groove, wherein said buckle is made up of plastic composite, wherein said composite material is become to be grouped into by following parts by weight: polyformaldehyde: 80-100 part, polyurethane: 40-50 part, flexibilizer: 5-15 part, anti-wear agent: 3-5 part, compatilizer: 5-8 part, antistatic agent: 3-5 part, antioxidant: 5-10 part.
The present invention is under initial condition, on the high pitch mouth of case lid, LED lamp is installed, in the time that used night, LED lamp changes and glimmers with music, elegant in appearance, is respectively arranged with buckle and draw-in groove at bottom and the top of casing, in the time that two audio amplifiers are superimposed, buckle can buckle into draw-in groove, and audio amplifier difficult drop-off above, has strengthened stability and practicality.Polyformaldehyde in the present invention in audio amplifier buckle composite material is commonly called as match steel or takes steel by force, there is Rockwell hardness, intensity and the rigidity of metalloid, within the scope of very wide temperature and humidity, all there is good self lubricity, fatigue durability, and there is elasticity and good chemical-resistant; And the hardness of polyurethane is high, resistance to wear is good, and the temperature tolerance between subzero 20 ℃-high temperature of 120 DEG C is good, and cost is low, pollution-free.Buckle is composite by a certain percentage by polyformaldehyde and polyurethane, and reasonable composite flexibilizer, anti-wear agent, compatilizer, antistatic agent and antioxidant etc., further improve the performance of polyformaldehyde and polyurethane, make that buckle intensity in audio amplifier is high, percentage elongation is large, bending modulus is high, product size good stability, particularly notch impact strength is high, good toughness.
In above-mentioned a kind of audio amplifier with LED lamp, as preferably, the composite material of described buckle is become to be grouped into by following parts by weight: polyformaldehyde: 80-100 part, polyurethane: 40-50 part, flexibilizer: 5-15 part, anti-wear agent: 3-5 part, compatilizer: 5-8 part, antistatic agent: 3-5 part, antioxidant: 5-10 part.
As preferably, described polyformaldehyde is one or both in acefal homopolymer, copolymerized methanal.
As preferably, described flexibilizer is one or more in elastic body toughening agent, rigid inorganic filler toughening agent, composite toughing agent; Described elastic body toughening agent is one or more in TPO, phenylethylene, polyesters, thermoplastic polyurethane, polyamide-based, acrylonitrile-butadiene rubber, ethylene-propylene rubber, ethylene propylene diene rubber, described rigid inorganic filler toughening agent is one or more in talcum powder, diatomite, titanium dioxide, nano-calcium carbonate, glass microballoon, and described composite toughing agent is POE-g-MAH, SEBS-g-MAH, EPDM-g-MAH, TPU/nano-SiO
2, TPU/nano-CaCO
3in one or more.
As preferably, described anti-wear agent is one or more in macromolecular compound, lubricating oil, fibrous material, metal dust.Described macromolecular compound is one or more in polytetrafluoroethylene, poly-phthalimide, polyphenyl vinegar; Described lubricating oil is one or both in silicone oil, mineral oil; Described fibrous material is one or more in glass fibre, carbon fiber, aramid fiber; Described metal dust is one or more in copper powder, lead powder, zinc powder.
As preferably, described compatilizer is one or more in POE-g-MAH, phenolic resins, silane coupling agent, titante coupling agent.
As preferably, described antistatic agent is one or more of alkali metal salt of alkyl sulfonic acid, aminodithioformic acid.
As preferably, described antioxidant is one or more in Hinered phenols antioxidant, phosphite ester kind antioxidant, suffocated amine antioxidant.
In above-mentioned a kind of audio amplifier with LED lamp, the preparation method of described buckle comprises the steps:
S1, taking raw material according to the constituent of above-mentioned buckle and parts by weight, is the drying baker inner drying 2-4 hour of 60-80 ℃ in temperature by polyformaldehyde and polyurethane;
S2, above-mentioned flexibilizer, anti-wear agent, compatilizer, antistatic agent, antioxidant and dried polyformaldehyde and polyurethane are fully mixed and obtains hybrid resin particle;
S3, by injection molding machine of plastic injection mo(u)lding under the condition of 150-200 ℃ with buckle mould for above-mentioned hybrid resin particle, make buckle through pressurize, cooling forming, die sinking.
In above-mentioned a kind of audio amplifier with LED lamp, described box top is provided with some the first annular boss, at the bottom of described case, be provided with some the second annular boss and the 3rd annular boss with the concentric setting of the second annular boss, between described the second annular boss and the 3rd annular boss, form groove, in the time that two audio amplifiers are superimposed, described the first annular boss is inserted in groove, and described buckle buckles into draw-in groove.
In above-mentioned a kind of audio amplifier with LED lamp, described buckle comprises wedge portion and extension, it is capable that the cross section of described wedge portion is triangle, described extension is connected to case top and wherein one side is concordant with the one side of wedge portion, described wedge portion is provided with barb portion, described draw-in groove is provided with catching groove, and in the time that buckle is secured to draw-in groove, described barb portion is tightened on catching groove.
In above-mentioned a kind of audio amplifier with LED lamp, described wiring board is electrically connected to controller, and described controller control LED lamp changes brilliance and the brightness of glimmering in various degree with music.
Compared with prior art, the present invention has several advantages:
1, LED lamp changes with music glimmer different brilliance and brightness, in the time that used night, pleasing glittering, elegant in appearance.
2, buckle and draw-in groove are set and coordinate, combination closely when two audio amplifiers need to be used in combination, difficult drop-off, safe and effective.
3, at the bottom of case top and case, be respectively arranged with the first annular boss and groove, the position can effectively control two audio amplifier stacks time, clamps in draw-in groove buckle accurately, has also increased stability simultaneously.
4, the mechanical strength of resin of buckle is high, and percentage elongation is large, and bending modulus is high, product size good stability, and particularly notch impact strength is high, and good toughness is not easy embrittlement and damages in connection procedure, after connection, can make audio amplifier difficult drop-off, and cost is low.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is the structural representation of bottom in the present invention.
Fig. 3 is the structure for amplifying schematic diagram when tension of buckle and draw-in groove in the present invention.
Fig. 4 is blast structural representation of the present invention.
In figure, 10, case lid; 11, high pitch mouth; 12, bass mouth; 13, circular arc camber; 20, casing; 21, case top; 22, buckle; 221, barb portion; 222, wedge portion; 223, extension; 23, the first annular boss; 24, installing hole; 25, at the bottom of case; 251, groove; 26, the second annular boss; 27, the 3rd annular boss; 28, draw-in groove; 29, catching groove; 30, LED lamp; 31, wiring board; 32, controller.
Embodiment
Be below specific embodiments of the invention by reference to the accompanying drawings, technical scheme of the present invention is further described, but the present invention be not limited to these embodiment.
As shown in Figure 1 and Figure 4, the present invention includes casing 20 and be arranged on the case lid 10 on casing 20, on case lid 10, be provided with high pitch mouth 11 and bass mouth 12, the periphery of high pitch mouth 11 is made up of and both ends open four circular arc cambers 13, the opening of one end is circular, other end opening is quadrangle, the curvature of the circular arc camber 13 contacting with bass mouth 12 is towards bass mouth 12 directions, on circular arc camber 13 on the high pitch mouth 11 of 12 liang of side directions of bass mouth, offer some installing holes 24, in installing hole 24, correspondence is interspersed with LED lamp 30 one by one, LED lamp 30 is electrically connected to wiring board 31, wiring board 31 is arranged on case lid 10, be electrically connected to controller 32 at wiring board 31, controller 32 is controlled LED lamp 30 and is changed with music glimmer different brilliance and brightness.
As shown in Figures 1 to 4, casing 20 comprises at the bottom of case top 21 and case 25, 21, case top is provided with some the first annular boss 23, at the bottom of case, 25 are provided with some the second annular boss 26 and the 3rd annular boss 27 with the concentric setting of the second annular boss 26, between the second annular boss 26 and the 3rd annular boss 27, form groove 251, in the time that two audio amplifiers are superimposed, the first annular boss 23 is inserted in groove 251, case top 21 is provided with some buckles 22 and outstanding case top 21, buckle 22 comprises wedge portion 222 and extension 223, it is capable that the cross section of wedge portion 222 is triangle, extension 223 is connected to case top 21 and wherein one side is concordant with the one side of wedge portion 222, wedge portion 222 is provided with barb portion 221, at the bottom of case, 25 are provided with draw-in groove 28, draw-in groove 28 is provided with catching groove 29, in the time that two audio amplifiers are superimposed, buckle 22 can buckle into draw-in groove 28, barb portion 221 is tightened on catching groove 29.
The present invention is under initial condition, audio amplifier is added to another above audio amplifier, by the first annular boss 23 alignment indentation 251, light pressure downwards, the edge of draw-in groove 28 is squeezed in wedge portion 222, again to pressing down, extension 223 is out of shape, until back-off portion buckles in catching groove 29, extension 223 is replied original shape, barb portion 221 is tightened on catching groove 29, the base abuts of the first annular boss 23 is in the bottom of groove 251 simultaneously, open audio amplifier, music has been put, controller 32 on wiring board 31 in audio amplifier starts, the LED lamp 30 of controlling on high pitch mouth 11 changes with music glimmer different brilliance and brightness.
Wherein, above-mentioned buckle is made up of plastic composite, and described composite material is become to be grouped into by following parts by weight: polyformaldehyde: 80-100 part, polyurethane: 40-50 part, flexibilizer: 5-15 part, anti-wear agent: 3-5 part, compatilizer: 5-8 part, antistatic agent: 3-5 part, antioxidant: 5-10 part.
Described in the embodiment of the present invention 1-3 buckle constituent and parts by weight
Embodiment 1
Constituent and parts by weight according to buckle described in table 1 embodiment 1 take raw material, are the drying baker inner drying 3 hours of 70 ℃ by polyformaldehyde and polyurethane in temperature;
Above-mentioned flexibilizer, anti-wear agent, compatilizer, antistatic agent, antioxidant and dried polyformaldehyde and polyurethane are fully mixed and obtains hybrid resin particle;
By injection molding machine of plastic injection mo(u)lding under the condition of 180 ℃ with buckle mould for above-mentioned hybrid resin particle, make buckle through pressurize, cooling forming, die sinking.
Embodiment 2
Constituent and parts by weight according to buckle described in table 1 embodiment 2 take raw material, are the drying baker inner drying 2 hours of 60 ℃ by polyformaldehyde and polyurethane in temperature;
Above-mentioned flexibilizer, anti-wear agent, compatilizer, antistatic agent, antioxidant and dried polyformaldehyde and polyurethane are fully mixed and obtains hybrid resin particle;
By injection molding machine of plastic injection mo(u)lding under the condition of 150 ℃ with buckle mould for above-mentioned hybrid resin particle, make buckle through pressurize, cooling forming, die sinking.
Embodiment 3
Constituent and parts by weight according to buckle described in table 1 embodiment 3 take raw material, are the drying baker inner drying 4 hours of 80 ℃ by polyformaldehyde and polyurethane in temperature;
Above-mentioned flexibilizer, anti-wear agent, compatilizer, antistatic agent, antioxidant and dried polyformaldehyde and polyurethane are fully mixed and obtains hybrid resin particle;
By injection molding machine of plastic injection mo(u)lding under the condition of 200 ℃ with buckle mould for above-mentioned hybrid resin particle, make buckle through pressurize, cooling forming, die sinking.
Comparative example 1:
The buckle of selecting commercially available employing nylon 6 resin material to make.
The commercially available generic card button of the buckle that embodiment 1-3 is made and comparative example 1 compares, and comparative result is as shown in table 2.
Table 2: the comparative result of embodiment 1-3 buckle and comparative example 1 commercially available common buckle
In sum, in audio amplifier of the present invention, LED lamp 30 changes with music glimmer different brilliance and brightness, in the time that used night, pleasing glittering, elegant in appearance; Buckle 22 is set and draw-in groove 28 coordinates, the intensity of buckle is high, and percentage elongation is large, and bending modulus is high, good toughness, and combination closely when two audio amplifiers need to be used in combination, difficult drop-off, safe and effective, and production cost is low; At the bottom of case top 21 and case, 25 are respectively arranged with the first annular boss 23 and groove 251, and the position can effectively control two audio amplifier stacks time, clamps in draw-in groove 28 buckle 22 accurately, has also increased stability simultaneously.
Specific embodiment described herein is only to the explanation for example of the present invention's spirit.Those skilled in the art can make various modifications or supplement or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present invention or surmount the defined scope of appended claims.
Claims (10)
1. the audio amplifier with LED lamp, comprise casing and be arranged on the case lid on casing, on case lid, be provided with high pitch mouth, it is characterized in that, on described high pitch mouth, be provided with some installing holes, in described installing hole, correspondence is interspersed with LED lamp one by one, described LED board is electrically connected to wiring board, described wiring board is arranged on case lid, at the bottom of described casing comprises case top and case, described case top is provided with some buckles and outstanding case top, at the bottom of described case, be provided with draw-in groove, described buckle can buckle into draw-in groove, wherein said buckle is made up of plastic composite, wherein said composite material is become to be grouped into by following parts by weight: polyformaldehyde: 80-100 part, polyurethane: 40-50 part, flexibilizer: 5-15 part, anti-wear agent: 3-5 part, compatilizer: 5-8 part, antistatic agent: 3-5 part, antioxidant: 5-10 part.
2. the audio amplifier with LED lamp according to claim 1, it is characterized in that, the composite material of described buckle is become to be grouped into by following parts by weight: polyformaldehyde: 80-100 part, polyurethane: 40-50 part, flexibilizer: 5-15 part, anti-wear agent: 3-5 part, compatilizer: 5-8 part, antistatic agent: 3-5 part, antioxidant: 5-10 part.
3. the audio amplifier with LED lamp according to claim 1 and 2, is characterized in that, described polyformaldehyde is one or both in acefal homopolymer, copolymerized methanal.
4. the audio amplifier with LED lamp according to claim 1 and 2, is characterized in that, described flexibilizer is one or more in elastic body toughening agent, rigid inorganic filler toughening agent, composite toughing agent.
5. the audio amplifier with LED lamp according to claim 1 and 2, is characterized in that, described anti-wear agent is one or more in macromolecular compound, lubricating oil, fibrous material, metal dust; Described compatilizer is one or more in POE-g-MAH, phenolic resins, silane coupling agent, titante coupling agent.
6. the audio amplifier with LED lamp according to claim 1 and 2, is characterized in that, described antistatic agent is one or more of alkali metal salt of alkyl sulfonic acid, aminodithioformic acid; Described antioxidant is one or more in Hinered phenols antioxidant, phosphite ester kind antioxidant, suffocated amine antioxidant.
7. according in the audio amplifier with LED lamp described in claim 1, it is characterized in that, the preparation method of described buckle comprises the steps:
S1, taking raw material according to the constituent of above-mentioned buckle and parts by weight, is the drying baker inner drying 2-4 hour of 60-80 ℃ in temperature by polyformaldehyde and polyurethane;
S2, above-mentioned flexibilizer, anti-wear agent, compatilizer, antistatic agent, antioxidant and dried polyformaldehyde and polyurethane are fully mixed and obtains hybrid resin particle;
S3, by injection molding machine of plastic injection mo(u)lding under the condition of 150-200 ℃ with buckle mould for above-mentioned hybrid resin particle, make buckle through pressurize, cooling forming, die sinking.
8. according in the audio amplifier with LED lamp described in claim 1, it is characterized in that, described box top is provided with some the first annular boss, at the bottom of described case, be provided with some the second annular boss and the 3rd annular boss with the concentric setting of the second annular boss, between described the second annular boss and the 3rd annular boss, form groove, in the time that two audio amplifiers are superimposed, described the first annular boss is inserted in groove, and described buckle buckles into draw-in groove.
9. according in the audio amplifier with LED lamp described in claim 1 or 8, it is characterized in that, described buckle comprises wedge portion and extension, it is capable that the cross section of described wedge portion is triangle, described extension is connected to case top and wherein one side is concordant with the one side of wedge portion, and described wedge portion is provided with barb portion, and described draw-in groove is provided with catching groove, in the time that buckle is secured to draw-in groove, described barb portion is tightened on catching groove.
10. according in the audio amplifier with LED lamp described in claim 1 or 8, it is characterized in that, described wiring board is electrically connected to controller, and described controller control LED lamp changes brilliance and the brightness of glimmering in various degree with music.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410111870.6A CN103888858A (en) | 2014-03-25 | 2014-03-25 | Loudspeaker box with LED lamps |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410111870.6A CN103888858A (en) | 2014-03-25 | 2014-03-25 | Loudspeaker box with LED lamps |
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| Publication Number | Publication Date |
|---|---|
| CN103888858A true CN103888858A (en) | 2014-06-25 |
Family
ID=50957546
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410111870.6A Pending CN103888858A (en) | 2014-03-25 | 2014-03-25 | Loudspeaker box with LED lamps |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103888858A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105133367A (en) * | 2015-08-13 | 2015-12-09 | 浙江繁盛超纤制品有限公司 | Aqueous polyurethane shoe lining leather production process |
| CN111961311A (en) * | 2020-07-06 | 2020-11-20 | 马鞍山市聚能新材料科技有限公司 | Production process of T-shaped buckle |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5714723A (en) * | 1996-09-13 | 1998-02-03 | Kang; Shih-Chang | Speaker assembly having a coupling mechanism |
| CN2662579Y (en) * | 2003-12-12 | 2004-12-08 | 精格电子工业股份有限公司 | Sound box and stacked composite structure thereof |
| CN201797580U (en) * | 2010-09-28 | 2011-04-13 | 王佩君 | Sound boxes capable of being overlapped |
| CN202143191U (en) * | 2011-08-19 | 2012-02-08 | 惠州三星电子有限公司 | Sound box with decorative lamp |
| CN102417690A (en) * | 2011-08-11 | 2012-04-18 | 古道尔工程塑胶（深圳）有限公司 | Polyformaldehyde composite material and preparation method thereof |
| WO2013103145A1 (en) * | 2012-01-06 | 2013-07-11 | ヤマハ株式会社 | Acoustic equipment |
| CN203120097U (en) * | 2013-01-25 | 2013-08-07 | 赵浩波 | Sound box and combination type sound box composed of the sound boxes |
| CN103269463A (en) * | 2013-06-05 | 2013-08-28 | 莫志强 | Loudspeaker box |
| CN103297881A (en) * | 2013-06-19 | 2013-09-11 | 刘骏涛 | Speaker |
-
2014
- 2014-03-25 CN CN201410111870.6A patent/CN103888858A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5714723A (en) * | 1996-09-13 | 1998-02-03 | Kang; Shih-Chang | Speaker assembly having a coupling mechanism |
| CN2662579Y (en) * | 2003-12-12 | 2004-12-08 | 精格电子工业股份有限公司 | Sound box and stacked composite structure thereof |
| CN201797580U (en) * | 2010-09-28 | 2011-04-13 | 王佩君 | Sound boxes capable of being overlapped |
| CN102417690A (en) * | 2011-08-11 | 2012-04-18 | 古道尔工程塑胶（深圳）有限公司 | Polyformaldehyde composite material and preparation method thereof |
| CN202143191U (en) * | 2011-08-19 | 2012-02-08 | 惠州三星电子有限公司 | Sound box with decorative lamp |
| WO2013103145A1 (en) * | 2012-01-06 | 2013-07-11 | ヤマハ株式会社 | Acoustic equipment |
| CN203120097U (en) * | 2013-01-25 | 2013-08-07 | 赵浩波 | Sound box and combination type sound box composed of the sound boxes |
| CN103269463A (en) * | 2013-06-05 | 2013-08-28 | 莫志强 | Loudspeaker box |
| CN103297881A (en) * | 2013-06-19 | 2013-09-11 | 刘骏涛 | Speaker |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105133367A (en) * | 2015-08-13 | 2015-12-09 | 浙江繁盛超纤制品有限公司 | Aqueous polyurethane shoe lining leather production process |
| CN111961311A (en) * | 2020-07-06 | 2020-11-20 | 马鞍山市聚能新材料科技有限公司 | Production process of T-shaped buckle |
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Application publication date: 20140625 |