CN201399353Y - Fresh rubber seed teeth-roller cracker - Google Patents
Fresh rubber seed teeth-roller cracker Download PDFInfo
- Publication number
- CN201399353Y CN201399353Y CN2009201108268U CN200920110826U CN201399353Y CN 201399353 Y CN201399353 Y CN 201399353Y CN 2009201108268 U CN2009201108268 U CN 2009201108268U CN 200920110826 U CN200920110826 U CN 200920110826U CN 201399353 Y CN201399353 Y CN 201399353Y
- Authority
- CN
- China
- Prior art keywords
- discaling roll
- teeth
- rubber seed
- roller
- discaling
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 10
- 239000010959 steel Substances 0.000 claims abstract description 10
- 230000005540 biological transmission Effects 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 abstract description 4
- 239000003638 chemical reducing agent Substances 0.000 abstract 2
- 238000005336 cracking Methods 0.000 abstract 2
- 230000000903 blocking effect Effects 0.000 abstract 1
- 230000001276 controlling effect Effects 0.000 abstract 1
- 230000001360 synchronised effect Effects 0.000 abstract 1
- 238000013467 fragmentation Methods 0.000 description 6
- 238000006062 fragmentation reaction Methods 0.000 description 6
- 241000196324 Embryophyta Species 0.000 description 5
- 235000019198 oils Nutrition 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 238000010298 pulverizing process Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 244000043261 Hevea brasiliensis Species 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 235000017060 Arachis glabrata Nutrition 0.000 description 1
- 244000105624 Arachis hypogaea Species 0.000 description 1
- 235000010777 Arachis hypogaea Nutrition 0.000 description 1
- 235000018262 Arachis monticola Nutrition 0.000 description 1
- 229920002101 Chitin Polymers 0.000 description 1
- 244000068988 Glycine max Species 0.000 description 1
- 235000010469 Glycine max Nutrition 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 235000012343 cottonseed oil Nutrition 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 235000016709 nutrition Nutrition 0.000 description 1
- 230000035764 nutrition Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 235000020232 peanut Nutrition 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 235000020238 sunflower seed Nutrition 0.000 description 1
- 235000013311 vegetables Nutrition 0.000 description 1
Images
Abstract
A fresh rubber seed teeth-roller cracker consists of a support, teeth rollers, teeth roller shafts, teeth roller bearings, an electric motor, a swing-needle type speed reducer of the electric motor, meshing gears, a speed regulating motor, a swing-needle type speed reducer of the speed regulating motor, springs and steel brushes. The diameters of the teeth rollers and an interval between the teethrollers meet requirements of cracking rubber seeds. The surface of each teeth roller is milled with slots, sections of the slots are in step shape, and the steel brushes which are arranged under theteeth rollers can not only prevent the rubber seeds skidding on the surfaces of the teeth rollers but prevent cracked rubber seeds from blocking the slots on the teeth rollers. The position of one ofthe two teeth roller is fixed, the position of the other teeth roller is controlled by the elasticity of the two springs, the elasticity of the springs keep constant, and then the interval between thetwo teeth roller can be automatically adjusted and adapted according to the sizes of the rubber seeds. Rotating speed of one teeth roller is constant, rotating speed of the other teeth roller is adjustable, and further, rotating speeds of the two teeth rollers can be synchronous and can also keep differential with optional proportion, thereby optionally controlling cracking degree.
Description
Technical field
The utility model relates to a kind of virgin rubber seed rod-toothed crusher.
Background technology
Rubber seed is the seed of rubber tree, ellipse, and because of the different sizes of kind have bigger difference, diameter 15-30mm, weight is the 2-4 gram.Rubber seed is made up of kind of shell and kind benevolence two parts.It is hard to plant chitin ground, and flexible, thickness are about 1mm.Plant benevolence in kind of a shell inside, appearance has soft thin layer.The water content of virgin rubber seed is especially planted benevolence up to 30-35%, and water content has more than 40%.As the seed of rubber tree, also contain rubber in the rubber seed benevolence, content is about 1-2%.Rubber seed benevolence contains abundant nutrition, comprises fat and protein, has very high economic worth.No matter process rubber seed, be in order to dry, to extract oil or in order shelling, all must to open rubber seed, rubber seed being pulverized or fragmentation.
At present, still do not have the broken problem that relevant patent, document relate to the virgin rubber seed, do not have yet ready-made technology, technology or device can broken virgin rubber seed, especially water content height, contain the many virgin rubber seeds of rubber.Existing rubber seed processing factory all is after the purchase of virgin rubber seed, stacks 40-60 days on the stockyard, waits the moisture of virgin rubber seed to volatilize naturally, becomes after the dry rubber substance seed of dehydration, rubber seed is pulverized again, be used for then modified, extract oil.
Be used to pulverize disc type or the chain hammer type pulverizer of pulverizer for using always of dry rubber substance seed.But these pulverizers all can not be used for the pulverizing of virgin rubber seed.The virgin rubber seed is the different rubber seed benevolence pulverizing that cause of water content with the difference of dry rubber substance seed maximum, and viscosity is different afterwards.The rubber seed benevolence of doing does not have viscosity after pulverizing, can be not bonding mutually, but be dispersed into granule, can pulverize smoothly, transport, process.Virgin rubber seed water content height after the pulverizer of high speed rotating bump, breaks into the extremely strong pastel of viscosity.Rubber in the rubber seed benevolence has strengthened the viscosity of pastel more as natural adhesion agent, makes this pastel to be connected on its all surfaces that touch at the station, comprises the inner casing of pulverizer, the discharging opening of pulverizer, internal conflict of bucket elevator or the like.The consequently very fast obstruction in pulverizer inside is if untimely cleaning will increase until burning by the power motor load at once.Even if with manually clearing up pulverizer by force, pulverize the pastel that comes out and also do not possess mobility of particle, be difficult to transportation or processing.
What the utility model adopted is the principle of toothed roll crusher, but existing discaling roll formula oil plant flaker all can not be used for the fragmentation of virgin rubber seed.Problem is mainly from four aspects: one, size does not meet, rubber seed than existing oilseed such as soybean, vegetable seed, peanut, sunflower seeds, cottonseed, much bigger, so can not directly use existing oil plant flaker; Its two, rubber seed has smooth tough and tensile shell, even existing discaling roll flaker size is amplified, the gap is transferred big, also can run into problem of slip, can't be broken; Its three, viscosity is too strong after the rubber seed fragmentation, even engrave common groove on the discaling roll surface, the rubber seed benevolence after broken also can be filled groove very soon; Its four, difference in size is very big between the rubber seed different cultivars, and mixed in together often, in order to reach optimized crushing effect, the gap of the manual adjustment discaling roll that need not stop is difficult to the optimization that reaches real.
The utility model content
In order to overcome the problem that existing oil plant rod-toothed crusher can not broken rubber seed, at above problem, the utility model aims to provide a kind of discaling roll formula breaker at the virgin rubber seed.
In order to realize above-mentioned purpose of the present utility model, the utility model provides following technical scheme:
A kind of virgin rubber seed rod-toothed crusher, comprise buncher 8, spring 10, steel brush 11 that support 1, discaling roll 3 and 9, discaling roll axle 12, discaling roll bearing 4, the motor 5 of pendulum pin type decelerator deceleration, interlock gear 6, pendulum pin type decelerator slow down, discaling roll (3) is fixed on the support (1) by bearing (4), and discaling roll (3) links to each other with the fixed motor (5) that slows down by the pendulum pin type decelerator; The bearing of another discaling roll (9) is by the elastic force control of two springs (10), go up slip at support (1), thereby regulate two discaling rolls (3, the size in the gap 9) (13), discaling roll (9) is connected with the buncher (8) of pendulum pin type decelerator deceleration by a pair of interlock gear (6,7) transmission; Be milled with a rule groove (2) on two discaling rolls (3,9), with discaling roll axle (12) angle be 45 the degree, groove (2) section is stepped.
In the said apparatus, a discaling roll (3) fixed-site, the position of another discaling roll (9) is by the elastic force control of two springs (10), and the maintenance of the elastic force of spring is constant, and the gap between the discaling roll (13) are with size adjustment automatically, the adaptation automatically of rubber seed.
In the said apparatus, the distance between the interlock gear (6,7) with adapt to discaling roll (9) on support (1) sliding scale and change.
In the said apparatus, a discaling roll (3) invariablenes turning speed, another discaling roll (9) rotating speed is adjustable, and the rotating speed of two discaling rolls both can keep also can keeping the differential of arbitrary proportion synchronously, thus the degree of control virgin rubber seed fragmentation.
In the said apparatus, discaling roll (3,9) below is provided with steel brush
Be used to prevent that rubber seed benevolence from stopping up the groove on the discaling roll (3,9)
The utility model solves the principle of the technical scheme that prior art problems adopted and method based on one, increases the diameter of discaling roll and the size of discaling roll surface groove, makes it to meet the size of rubber seed.Its two, the discaling roll surface is milled into groove and changes stairstepping into by common rectangle, and the axle of groove and discaling roll takes the oblique angles of 45 degree, can not only prevent that like this rubber seed from skidding, and stair-stepping groove is not easy to stop up, and is convenient to cleaning.Its three, two pairs of steel brushes are set above discaling roll, clear up the rubber seed benevolence of filling in the groove at any time.Its four, fix a discaling roll, another discaling roll position adopts spring force to control.Spring strength is constant, makes the pressure of two discaling rolls keep constant, thereby adapts to the rubber seed of different cultivars, different size automatically.They are five years old, in order to control the degree of crushing of rubber seed hull and rubber seed benevolence, two discaling rolls both can rotate by differential, obtain maximum crushing effect (such as in order to dry, wish the thorough more good more of fragmentation), also can rotate synchronously, obtain limited crushing effect (, not wishing rubber seed benevolence also broken) such as in order to shell.Concrete way is that a discaling roll adopts common electric machine to add the drive of pendulum pin type decelerator, and invariablenes turning speed, another discaling roll adopt buncher to add the pendulum pin type decelerator and drive by the gear interlock, and rotating speed can be regulated.
The beneficial effects of the utility model are: can the freshest, high broken moisture rubber seeds, can not occur skidding, situation such as obstruction; Rubber seed for different cultivars can adapt to automatically, need not manual adjustment; And can regulate the degree of crushing of rubber seed hull, rubber seed benevolence arbitrarily, both can be follow-up oven dry service, also can be follow-up shelling service.
Description of drawings
Fig. 1 is the structural representation of the utility model discaling roll formula virgin rubber seed breaker;
Fig. 2 is the profile of discaling roll 3, shows grooved.
1. supports among the figure, 2. discaling roll groove, 3. discaling roll, 4. discaling roll bearing, 5. motor and pendulum pin type decelerator, 6. interlock gear, 7. interlock gear, 8. buncher and pendulum pin type decelerator, 9. discaling roll, 10. spring, 11. steel brushes, 12 discaling roll axles, 13 gaps.
The specific embodiment
The utility model is further specified with embodiment below in conjunction with accompanying drawing, but do not limit the utility model with this.
A kind of virgin rubber seed rod-toothed crusher, comprise support 1. buncher 8, spring 10, steel brush 11 that the motor 5 that roller 3 and 9, discaling roll axle 12, discaling roll bearing 4, pendulum pin type decelerator slow down, interlock gear 6, pendulum pin type decelerator slow down, discaling roll (3) is fixed on the support (1) by bearing (4), and discaling roll (3) links to each other with the fixed motor (5) that slows down by the pendulum pin type decelerator; The bearing of another discaling roll (9) is by the elastic force control of two springs (10), go up slip at support (1), thereby regulate two discaling rolls (3, the size in the gap 9) (13), discaling roll (9) is connected with the buncher (8) of pendulum pin type decelerator deceleration by a pair of interlock gear (6,7) transmission; Be milled with a rule groove (2) on two discaling rolls (3,9), with discaling roll axle (12) angle be 45 the degree, groove (2) section indention.
In the present embodiment, one fixedly discaling roll (3) be fixed on the support (1) by bearing (4), its position on support is motionless.The bearing of another movable discaling roll (9) can be gone up at support (1) and slide, thereby regulates the gap 13 between two discaling rolls (3,9).During the fragmentation rubber seed, the size of gap of tooth roller is by the size decision of rubber seed, because the elastic force of spring (10) is constant relatively: when the rubber seed particle is bigger, can support the gap of discaling roll to such an extent that open, vice versa.Therefore this device can adapt to the kind and size of rubber seed automatically, obtains the constant relatively ratio of reduction.All be milled with a rule groove (2) on two discaling rolls (3,9), with discaling roll axle (12) angle be 45 the degree, groove (2) section is stepped.Stair-stepping groove (2) can prevent that the rubber seed particle from skidding between discaling roll, can significantly alleviate the adhesion of rubber seed benevolence again and stop up groove (2).The rubber seed benevolence that is blocked on a small quantity in the groove (2) can be removed by a pair of steel brush (11) of discaling roll below.
Fixedly the rotating speed of discaling roll (3) is constant, and power is from the fixed motor (5) that slows down by the pendulum pin type decelerator.The rotating speed of movable discaling roll (9) then can be regulated, and power is from the buncher (8) that slows down by the pendulum pin type decelerator.Because movable discaling roll (9) can go up move at support (1), thus the pendulum pin type decelerator can not directly be fixed on the discaling roll axle, but by a pair of interlock gear (6,7) transmission.This can change within limits to the distance between the interlock gear (6,7), with the slip of adaptive act discaling roll (9) on support (1).
Claims (3)
1, a kind of virgin rubber seed rod-toothed crusher, the buncher (8), spring (10), the steel brush (11) that comprise motor (5) that support (1), discaling roll (3) and (9), discaling roll axle (12), discaling roll bearing (4), pendulum pin type decelerator slow down, interlock gear (6) and (7), the deceleration of pendulum pin type decelerator, discaling roll (3) is fixed on the support (1) by bearing (4), and discaling roll (3) links to each other with the fixed motor (5) that slows down by the pendulum pin type decelerator; The bearing of another discaling roll (9) is by the elastic force control of two springs (10), go up slip at support (1), thereby regulate two discaling rolls (3, the size in the gap 9) (13), discaling roll (9) is connected with the buncher (8) of pendulum pin type decelerator deceleration by a pair of interlock gear (6,7) transmission; Be milled with a rule groove (2) on two discaling rolls (3,9), with discaling roll axle (12) angle be 45 the degree, groove (2) section is stepped.
2, virgin rubber seed rod-toothed crusher according to claim 1, it is characterized in that: described discaling roll (3) fixed-site, and the position of discaling roll (9) keeps the elastic force control of constant spring (10) and fixing by two elastic force, gap (13) between the discaling roll (3,9) is adjusted automatically, is adapted to automatically with the size of rubber seed.
3, virgin rubber seed rod-toothed crusher according to claim 1 is characterized in that: described discaling roll (3,9) below is provided with steel brush (11), is used to prevent that rubber seed benevolence from stopping up the groove (2) on the discaling roll (3,9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201108268U CN201399353Y (en) | 2009-01-12 | 2009-01-12 | Fresh rubber seed teeth-roller cracker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201108268U CN201399353Y (en) | 2009-01-12 | 2009-01-12 | Fresh rubber seed teeth-roller cracker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201399353Y true CN201399353Y (en) | 2010-02-10 |
Family
ID=41659147
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201108268U Expired - Lifetime CN201399353Y (en) | 2009-01-12 | 2009-01-12 | Fresh rubber seed teeth-roller cracker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201399353Y (en) |
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101862693A (en) * | 2010-06-13 | 2010-10-20 | 罗盈本 | Grinding roller regulation mechanism of grinding machine |
| CN102160676A (en) * | 2011-03-21 | 2011-08-24 | 王云 | Rubber seed shelling equipment |
| CN102233287A (en) * | 2011-05-01 | 2011-11-09 | 浙江黑白矿山机械有限公司 | Double-roll crusher with spiral multifunctional crushing rolls |
| CN102824936A (en) * | 2012-09-24 | 2012-12-19 | 四川皇龙智能破碎技术股份有限公司 | Automatic compression roller gap regulation meshing type extruding and crushing machine |
| CN102921495A (en) * | 2012-11-21 | 2013-02-13 | 安徽宏实光机电高科有限公司 | Rapeseed crusher |
| CN103449227A (en) * | 2013-08-30 | 2013-12-18 | 无锡宝南机器制造有限公司 | Paper pinch roller pressure adjusting device |
| CN103464239A (en) * | 2013-10-15 | 2013-12-25 | 北海和荣活性炭科技有限责任公司 | Opposite roller type coconut shell crusher |
| CN103567151A (en) * | 2013-11-14 | 2014-02-12 | 欧阳辉站 | Firecracker trash recycling and classifying machine |
| CN104841543A (en) * | 2015-04-07 | 2015-08-19 | 精韬伟业（天津）环保能源科技发展有限公司 | Winding resistant crusher specially used for plant wastes |
| CN105057021A (en) * | 2015-08-11 | 2015-11-18 | 广州市联冠机械有限公司 | Rubber crusher and control application method thereof |
| CN105533778A (en) * | 2016-02-21 | 2016-05-04 | 刘丽华 | Improved peanut kernel crushing device |
| CN105879960A (en) * | 2015-07-31 | 2016-08-24 | 浙江省地质矿产研究所 | Ultrasonic ultrafine grinding device |
| CN107715978A (en) * | 2017-11-06 | 2018-02-23 | 宁波暴雪信息技术开发有限公司 | A kind of autogenous mill with granular size regulation and secondary grinding function |
| CN110000965A (en) * | 2019-04-12 | 2019-07-12 | 安徽世界村智能装备有限公司 | A kind of zigzag double roller drum-type rubber grinder and its cutting Flour milling method |
| CN109999951A (en) * | 2019-04-12 | 2019-07-12 | 安徽世界村智能装备有限公司 | A kind of bumps zigzag double roller roller |
| CN112545150A (en) * | 2020-10-30 | 2021-03-26 | 安徽省潜山县天柱刷业有限公司 | Industrial cleaning brush |
| CN113840658A (en) * | 2019-05-09 | 2021-12-24 | 美卓奥图泰美国有限公司 | Crushing device |
| CN114100742A (en) * | 2021-11-19 | 2022-03-01 | 哈尔滨职业技术学院 | Crushing device of biological pharmaceutical equipment and operation method |
| CN114453119A (en) * | 2022-02-10 | 2022-05-10 | 吴维椿 | Stone refines device for construction |
-
2009
- 2009-01-12 CN CN2009201108268U patent/CN201399353Y/en not_active Expired - Lifetime
Cited By (26)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101862693A (en) * | 2010-06-13 | 2010-10-20 | 罗盈本 | Grinding roller regulation mechanism of grinding machine |
| CN102160676A (en) * | 2011-03-21 | 2011-08-24 | 王云 | Rubber seed shelling equipment |
| CN102233287A (en) * | 2011-05-01 | 2011-11-09 | 浙江黑白矿山机械有限公司 | Double-roll crusher with spiral multifunctional crushing rolls |
| CN102824936A (en) * | 2012-09-24 | 2012-12-19 | 四川皇龙智能破碎技术股份有限公司 | Automatic compression roller gap regulation meshing type extruding and crushing machine |
| CN102921495A (en) * | 2012-11-21 | 2013-02-13 | 安徽宏实光机电高科有限公司 | Rapeseed crusher |
| CN103449227B (en) * | 2013-08-30 | 2015-09-02 | 无锡宝南机器制造有限公司 | Paper pinch roller pressure control apparatus |
| CN103449227A (en) * | 2013-08-30 | 2013-12-18 | 无锡宝南机器制造有限公司 | Paper pinch roller pressure adjusting device |
| CN103464239A (en) * | 2013-10-15 | 2013-12-25 | 北海和荣活性炭科技有限责任公司 | Opposite roller type coconut shell crusher |
| CN103464239B (en) * | 2013-10-15 | 2015-11-18 | 北海和荣活性炭科技有限责任公司 | A kind of opposite roller type coconut shell crusher |
| CN103567151A (en) * | 2013-11-14 | 2014-02-12 | 欧阳辉站 | Firecracker trash recycling and classifying machine |
| CN104841543A (en) * | 2015-04-07 | 2015-08-19 | 精韬伟业（天津）环保能源科技发展有限公司 | Winding resistant crusher specially used for plant wastes |
| CN104841543B (en) * | 2015-04-07 | 2017-11-17 | 精韬伟业（天津）环保能源科技发展有限公司 | Plant Anti-winding garbage Special grinder for disintegrating |
| CN105879960A (en) * | 2015-07-31 | 2016-08-24 | 浙江省地质矿产研究所 | Ultrasonic ultrafine grinding device |
| CN105057021B (en) * | 2015-08-11 | 2019-01-25 | 广州市联冠机械有限公司 | Rubber breaker and its control application method |
| CN105057021A (en) * | 2015-08-11 | 2015-11-18 | 广州市联冠机械有限公司 | Rubber crusher and control application method thereof |
| CN105533778A (en) * | 2016-02-21 | 2016-05-04 | 刘丽华 | Improved peanut kernel crushing device |
| CN107715978A (en) * | 2017-11-06 | 2018-02-23 | 宁波暴雪信息技术开发有限公司 | A kind of autogenous mill with granular size regulation and secondary grinding function |
| CN107715978B (en) * | 2017-11-06 | 2019-05-31 | 宁波暴雪信息技术开发有限公司 | A kind of autogenous mill with granular size adjusting and secondary grinding function |
| CN110000965A (en) * | 2019-04-12 | 2019-07-12 | 安徽世界村智能装备有限公司 | A kind of zigzag double roller drum-type rubber grinder and its cutting Flour milling method |
| CN109999951A (en) * | 2019-04-12 | 2019-07-12 | 安徽世界村智能装备有限公司 | A kind of bumps zigzag double roller roller |
| CN113840658A (en) * | 2019-05-09 | 2021-12-24 | 美卓奥图泰美国有限公司 | Crushing device |
| CN113840658B (en) * | 2019-05-09 | 2023-03-24 | 美卓奥图泰美国有限公司 | Crushing device |
| CN112545150A (en) * | 2020-10-30 | 2021-03-26 | 安徽省潜山县天柱刷业有限公司 | Industrial cleaning brush |
| CN114100742A (en) * | 2021-11-19 | 2022-03-01 | 哈尔滨职业技术学院 | Crushing device of biological pharmaceutical equipment and operation method |
| CN114453119A (en) * | 2022-02-10 | 2022-05-10 | 吴维椿 | Stone refines device for construction |
| CN114453119B (en) * | 2022-02-10 | 2023-09-29 | 湖南腾禹建筑工程有限公司 | Stone refining device for building construction |
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| GR01 | Patent grant | ||
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