CN114395265B - High-viscosity modified emulsified asphalt and preparation method thereof - Google Patents
High-viscosity modified emulsified asphalt and preparation method thereof Download PDFInfo
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- CN114395265B CN114395265B CN202210145191.5A CN202210145191A CN114395265B CN 114395265 B CN114395265 B CN 114395265B CN 202210145191 A CN202210145191 A CN 202210145191A CN 114395265 B CN114395265 B CN 114395265B
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L95/00—Compositions of bituminous materials, e.g. asphalt, tar, pitch
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
- B01D46/12—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces in multiple arrangements
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways
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Abstract
The invention discloses high-viscosity modified emulsified asphalt and a preparation method thereof, which relate to the technical field of asphalt preparation and are composed of the following materials: the asphalt comprises the following components of, by weight, 60 parts of matrix asphalt, 2 parts of an emulsifier, 1 part of a stabilizer, 6 parts of a thickener, 5 parts of an additive and 20 parts of deionized water. According to the invention, the shell, the fan, the first motor, the rotating rod, the filter screen, the telescopic rod, the elastic rod and the scraping rod are matched, the fan is driven to rotate through the output shaft of the first motor, the wet air inside the protective tank is blown out of the device, evaporation of water inside asphalt is accelerated, harmful substances in the air are filtered through the filter screen, the telescopic rod is driven to rotate through rotation of the rotating rod, dust on the surface of the filter screen is cleaned through the elastic rod, the filter screen is prevented from being blocked due to long-time use, the filtering effect is prevented from being influenced, and the heating efficiency of asphalt is improved.
Description
Technical Field
The invention relates to the technical field of asphalt preparation, in particular to high-viscosity modified emulsified asphalt and a preparation method thereof.
Background
The emulsified asphalt is road asphalt used at high temperature, is uniformly dispersed in water by adopting a chemical method to form a liquid state, can be used at normal temperature, has good fluidity, simple construction process, is nontoxic and is not easy to burn. However, as the ambient temperature rises, the emulsified asphalt has the problems of low cohesiveness, insufficient strength, poor low-temperature toughness and the like at high temperature after being solidified, so that the promotion and the application of the emulsified asphalt in the maintenance of asphalt pavement are restricted, and the modified emulsified asphalt not only has the characteristics of the emulsified asphalt, but also has the advantages of modified materials. The polymer is an ideal modifier with excellent performance and good compatibility with asphalt. Compared with matrix emulsified asphalt, the polymer modified emulsified asphalt has improved rutting resistance, high temperature performance, fatigue resistance, scouring resistance and adhesion with ores, short construction period, better economy and longer service life. The following problems exist in the prior art:
1. in the preparation process of the asphalt manufacturing device, water vapor is difficult to rapidly discharge due to the closed environment of the tank body, so that the efficiency of asphalt drying is slower, and the working efficiency of the device is reduced;
2. because the in-process of pitch is comparatively sticky, glues the inner wall at the heating jar easily, is difficult to clear up, reduces the work efficiency of device.
Disclosure of Invention
The invention provides high-viscosity modified emulsified asphalt and a preparation method thereof, wherein one purpose is to provide the capability of quickly discharging water vapor and solve the problem that the water vapor emission of a closed tank body is slower; another purpose is to solve the problem that asphalt is easy to adhere to the inner wall, so that the effect of improving the efficiency of the device is achieved.
In order to solve the technical problems, the invention adopts the following technical scheme:
a high-viscosity modified emulsified asphalt is composed of the following materials: 40-70 parts of matrix asphalt, 1-3 parts of emulsifier, 0.5-1.5 parts of stabilizer, 4-8 parts of thickener, 3-6 parts of additive and 15-25 parts of deionized water, and the matrix asphalt comprises the following materials: the asphalt comprises the following components of, by weight, 60 parts of matrix asphalt, 2 parts of an emulsifier, 1 part of a stabilizer, 6 parts of a thickener, 5 parts of an additive and 20 parts of deionized water.
The invention also provides a preparation method of the high-viscosity modified emulsified asphalt, which comprises the following steps:
step one, checking matrix asphalt, preventing other substances from being doped in the asphalt to influence the adhesion and service life of the asphalt, and putting the asphalt into the asphalt heating tank through the feed inlet to finish preparation work.
And secondly, when the asphalt is uniformly arranged at the bottom of the device, starting equipment, stirring and heating the matrix asphalt, diluting the asphalt by adding deionized water, fully stirring the matrix asphalt, and waiting for the temperature rise of the asphalt.
And thirdly, adding a stabilizer and an emulsifier into the heating tank when the temperature of the matrix asphalt is increased, fully stirring and mixing the asphalt by using a stirring rod, and adjusting the PH value of the asphalt.
And fourthly, adding a sticky agent into the stirred asphalt, rapidly pumping out the hot air from the inside to the outside through an air pumping device, accelerating evaporation of water in the asphalt, and discharging the asphalt by using an outlet after the asphalt becomes sticky.
The invention also provides an asphalt heating tank, which comprises an asphalt heating tank device main body, wherein the asphalt heating tank device main body comprises a power seat, one side of the power seat is fixedly connected with a supporting column, the top of the power seat is movably connected with a stirring device, the outer wall of the stirring device is provided with a switch device, one side of the stirring device is provided with an air draft device, the air draft device comprises a shell, the bottom of the shell is provided with an air inlet, the inner wall of the shell is movably connected with a fan, one side of the fan is provided with a first motor and a rotating rod, the stirring device comprises a protection tank, the inside of the protection tank is fixedly connected with a heating pipe, one side of the protection tank is provided with a feed inlet, one side of the protection tank is movably connected with the inner wall of the supporting column, and the inside of the protection tank is provided with a rotating column and a stirring rod
The technical scheme of the invention is further improved as follows: the inner wall of shell and the one end swing joint of dwang, the other end and the one side output shaft fixed connection of first motor of dwang, the opposite side output shaft and the inner wall fixed connection of first motor, the inner wall swing joint of shell has the filter screen.
The technical scheme of the invention is further improved as follows: the outer wall swing joint of filter screen has the pole of scraping, one side fixedly connected with telescopic link of scraping the pole, the inner wall of telescopic link and the outer wall swing joint of dwang, one side fixedly connected with elastic rod of scraping the pole.
The technical scheme of the invention is further improved as follows: the inner wall of protective tank and the outer wall swing joint of puddler, the outer wall of rotation post and one side fixed connection of puddler, the outer wall fixedly connected with rotary rod of rotation post, the one end swing joint of rotary rod rotates the wheel, the outer wall of rotation wheel and the inner wall swing joint of protective tank, the one end fixedly connected with rotary device of rotation post, one side fixedly connected with second motor of rotary device, one side of second motor and one side fixed connection of support column.
The technical scheme of the invention is further improved as follows: the rotating device comprises a rotating ring, wherein the inner wall of the rotating ring is movably connected with a fixed ring, the inner wall of the rotating ring is fixedly connected with a first baffle column, the inner wall of the fixed ring is movably connected with a second baffle column, and one side of the second baffle column is fixedly connected with an elastic ring.
The technical scheme of the invention is further improved as follows: the switch device comprises a landslide, the inner wall interactive connection of landslide has the movable block, the top fixedly connected with baffle of movable block, the bottom fixedly connected with elasticity post of movable block, the bottom fixedly connected with solid fixed ring of landslide, the outer wall fixedly connected with elasticity post of solid fixed ring, the outer wall swing joint of elasticity post has the recess post, the outer wall fixedly connected with rotation ring of recess post, the outer wall and the inner wall fixedly connected with of protective tank of rotation ring.
By adopting the technical scheme, compared with the prior art, the invention has the following technical progress:
1. the invention provides high-viscosity modified emulsified asphalt and a preparation method thereof.
2. The invention provides high-viscosity modified emulsified asphalt and a preparation method thereof.
3. The invention provides high-viscosity modified emulsified asphalt and a preparation method thereof, wherein a landslide, a movable block, a baffle, an elastic column, a rotating ring, a fixed ring, a groove column and an elastic column are matched, the baffle is driven to move downwards by pressing the movable block, the device is fixed when the movable block is loosened by the elasticity of the elastic column, the fixed ring drives the elastic column to move in the rotating ring by rotating the landslide, the rotating angle of the elastic column is fixed by the groove column, the discharge amount of asphalt is conveniently controlled, and the working efficiency of the device is improved.
Drawings
FIG. 1 is a process flow diagram of a high viscosity modified emulsified asphalt stirring device of the present invention;
FIG. 2 is a schematic perspective view of a stirring device for high-viscosity modified emulsified asphalt of the invention;
FIG. 3 is a schematic cross-sectional view of the suction device of the high viscosity modified emulsified asphalt stirring device of the present invention;
FIG. 4 is a schematic cross-sectional view of the high viscosity modified emulsified asphalt stirring apparatus of the present invention;
FIG. 5 is a schematic cross-sectional view of a rotary device of a stirring device for high-viscosity modified emulsified asphalt according to the present invention
FIG. 6 is a schematic cross-sectional view of the switching device of the high viscosity modified emulsified asphalt stirring device of the present invention.
In the figure: 1. an asphalt heating tank device main body; 2. an air draft device; 3. a stirring device; 4. a switching device; 5. a power seat; 6. a support column; 21. a housing; 22. a fan; 23. a first motor; 24. a rotating lever; 25. a filter screen; 26. a telescopic rod; 27. an elastic rod; 28. a scraping rod; 31. a protective tank; 32. heating pipes; 33. a feed inlet; 34. a second motor; 35. rotating the column; 36. a stirring rod; 37. a rotating rod; 38. a rotating wheel; 39. a rotating device; 391. a rotating ring; 392. a fixing ring; 393. a first stopper; 394. a second barrier post; 395. an elastic ring; 41. landslide; 42. a movable block; 43. a baffle; 44. an elastic column; 45. a rotating ring; 46. a fixing ring; 47. a groove column; 48. and (5) an elastic column.
Detailed Description
The invention is further illustrated by the following examples:
example 1
As shown in fig. 1-6, the present invention provides a high viscosity modified emulsified asphalt, which is composed of the following materials: 40-70 parts of matrix asphalt, 1-3 parts of emulsifier, 0.5-1.5 parts of stabilizer, 4-8 parts of thickener, 3-6 parts of additive and 15-25 parts of deionized water, and the matrix asphalt comprises the following materials: the invention also provides a preparation method of the high-viscosity modified emulsified asphalt, which comprises the following steps of:
step one, checking matrix asphalt, preventing other substances from being doped in the asphalt to influence the adhesion and service life of the asphalt, and putting the asphalt into the asphalt heating tank through the feed inlet to finish preparation work.
And secondly, when the asphalt is uniformly arranged at the bottom of the device, starting equipment, stirring and heating the matrix asphalt, diluting the asphalt by adding deionized water, fully stirring the matrix asphalt, and waiting for the temperature rise of the asphalt.
And thirdly, adding a stabilizer and an emulsifier into the heating tank when the temperature of the matrix asphalt is increased, fully stirring and mixing the asphalt by using a stirring rod, and adjusting the PH value of the asphalt.
And fourthly, adding a sticky agent into the stirred asphalt, rapidly pumping out the hot air from the inside to the outside through an air pumping device, accelerating evaporation of water in the asphalt, and discharging the asphalt by using an outlet after the asphalt becomes sticky.
The invention also provides an asphalt heating tank, which comprises an asphalt heating tank device main body 1, wherein the asphalt heating tank device main body 1 comprises a power seat 5, one side of the power seat 5 is fixedly connected with a supporting column 6, the top of the power seat 5 is movably connected with a stirring device 3, the outer wall of the stirring device 3 is provided with a switch device 4, one side of the stirring device 3 is provided with an air draft device 2, the air draft device 2 comprises a shell 21, the bottom of the shell 21 is provided with an air inlet, the inner wall of the shell 21 is movably connected with a fan 22, one side of the fan 22 is provided with a first motor 23 and a rotating rod 24, the stirring device 3 comprises a protective tank 31, the inside of the protective tank 31 is fixedly connected with a heating pipe 32, one side of the protective tank 31 is provided with a feed inlet 33, one side of the protective tank 31 is movably connected with the inner wall of the supporting column 6, the inside of the protective tank 31 is provided with a rotating column 35 and a stirring rod 36, the inner wall of the shell 21 is movably connected with one end of the rotating rod 24, the other end of the rotating rod 24 is fixedly connected with one side output shaft of a first motor 23, the other side output shaft of the first motor 23 is fixedly connected with the inner wall of the first motor 23, the other side of the first motor 23 is movably connected with the inner wall of the shell 21, the inner wall of the shell 21 is movably connected with a filter screen 25 and the filter screen 26 is rotatably connected with the filter screen 26, the filter screen 26 is rotatably connected with the filter screen 28 in the filter screen 28 through the inner side of the filter rod 28, the filter rod 28 is rotatably connected with the filter rod 28, the filter rod 28 is rotatably and the filter rod 28 is rotatably connected with the filter rod 28 through the filter rod 28, the filter rod 28 is rotatably and the filter rod is rotatably connected with the filter rod 28 is rotatably and the filter rod 28 is rotatably connected with the filter rod 26 through the filter rod 28, the dust on the surface of the filter screen 25 is cleaned by the scraping rod 28 through the elastic force of the elastic rod 27, so that the filter screen is prevented from being blocked due to long-time use, the filtering effect is affected, and the heating efficiency of asphalt is improved.
Example 2
As shown in fig. 1-6, on the basis of embodiment 1, the present invention provides a technical solution: preferably, the inner wall of the protective tank 31 is movably connected with the outer wall of the stirring rod 36, the outer wall of the rotating column 35 is fixedly connected with one side of the stirring rod 36, the outer wall of the rotating column 35 is fixedly connected with a rotating rod 37, one end of the rotating rod 37 is movably connected with a rotating wheel 38, the outer wall of the rotating wheel 38 is movably connected with the inner wall of the protective tank 31, one end of the rotating column 35 is fixedly connected with a rotating device 39, one side of the rotating device 39 is fixedly connected with a second motor 34, one side of the second motor 34 is fixedly connected with one side of the supporting column 6, the protective tank 31 is driven to rotate through the power seat 5, and the stirring rod 36 is driven to rotate in the opposite direction inside the protective tank 31 through rotation of an output shaft of the second motor 34.
Example 3
As shown in fig. 1-6, on the basis of embodiment 1, the present invention provides a technical solution: preferably, the rotating device 39 comprises a rotating ring 391, a fixed ring 392 is movably connected to the inner wall of the rotating ring 391, a first baffle post 393 is fixedly connected to the inner wall of the rotating ring 391, a second baffle post 394 is movably connected to the inner wall of the fixed ring 392, an elastic ring 395 is fixedly connected to one side of the second baffle post 394, the second baffle post 394 extrudes and fixes the fixed ring 392 through the elastic force of the elastic ring 395, and the rotating ring 391 and the fixed ring 392 can rotate only in one direction, so that asphalt inside the protective tank 31 is uniformly and rapidly stirred.
Example 4
As shown in fig. 1-6, on the basis of embodiment 1, the present invention provides a technical solution: preferably, the switch device 4 comprises a landslide 41, the inner wall of the landslide 41 is interactively connected with a movable block 42, the top of the movable block 42 is fixedly connected with a baffle 43, the bottom of the movable block 42 is fixedly connected with an elastic column 44, the bottom of the landslide 41 is fixedly connected with a fixed ring 46, the outer wall of the fixed ring 46 is fixedly connected with an elastic column 48, the outer wall of the elastic column 48 is movably connected with a groove column 47, the outer wall of the groove column 47 is fixedly connected with a rotating ring 45, the outer wall of the rotating ring 45 is fixedly connected with the inner wall of the protective tank 31, the baffle 43 is driven to move downwards by pressing the movable block 42, the device is fixed when the movable block 42 is loosened by the elasticity of the elastic column 44, the fixed ring 46 drives the elastic column 48 to move in the rotating ring 45 by rotating the elastic column 47, the rotating angle of the elastic column 48 is fixed by the groove column 47, the asphalt discharge amount is conveniently controlled, and the working efficiency of the device is improved.
The working principle of the high-viscosity modified emulsified asphalt and the preparation method thereof is specifically described below.
As shown in fig. 1-6, firstly, the output shaft of the first motor 23 rotates to drive the fan 22 to rotate, the wet air inside the protective tank 31 blows out the outside of the device, the evaporation of water inside asphalt is accelerated, harmful substances in the air are filtered through the filter screen 25, the rotating rod 24 rotates to drive the telescopic rod 26, the scraping rod 28 cleans dust on the surface of the filter screen 25 through the elastic force of the elastic rod 27, the filter screen is prevented from being blocked due to long-time use, the filtering effect is influenced, the heating efficiency of asphalt is improved, the protective tank 31 is driven to rotate through the power seat 5, the rotation wheel 38 is utilized to rotate, the output shaft of the second motor 34 rotates to drive the stirring rod 36 to rotate in the opposite direction inside the protective tank 31, the elastic force of the elastic ring 395 causes the second baffle column 394 to extrude and fix the fixed ring 392, the rotating ring 391 and the fixed ring 392 only in one direction, the slope of asphalt is uniformly and rapidly stirred through the asphalt inside the protective tank 31, the baffle 42 is driven to move downwards through the pressing of the movable block 42, the elastic force 44 causes the movable block 42 to loosen the device to rotate through the elastic force of the elastic force 44, the elastic force of the elastic ring 45 is controlled to rotate the fixed ring 48, and the rotation of the elastic ring 45 is controlled to rotate the fixed ring 48 through the elastic force 45, and the rotation of the elastic ring 45 is controlled to rotate the fixed ring 45.
The foregoing invention has been generally described in great detail, but it will be apparent to those skilled in the art that modifications and improvements can be made thereto. Accordingly, it is intended to cover modifications or improvements within the spirit of the inventive concepts.
Claims (1)
1. A preparation method of high-viscosity modified emulsified asphalt is characterized by comprising the following steps: the high-viscosity modified emulsified asphalt is composed of the following materials: 40-70 parts of matrix asphalt, 1-3 parts of emulsifier, 0.5-1.5 parts of stabilizer, 4-8 parts of thickener, 3-6 parts of additive and 15-25 parts of deionized water;
the preparation method comprises the following steps:
firstly, checking matrix asphalt, preventing other substances from being doped in the asphalt to influence the adhesion and service life of the asphalt, and putting the asphalt into the asphalt heating tank through a feed inlet to finish preparation work;
step two, when the asphalt is uniformly arranged at the bottom of the device, starting equipment, stirring and heating the matrix asphalt, diluting the asphalt by adding deionized water, fully stirring the matrix asphalt, and waiting for the temperature rise of the asphalt;
step three, adding a stabilizer and an emulsifier into a heating tank when the temperature of the matrix asphalt is increased, fully stirring and mixing the asphalt by a stirring rod, and adjusting the PH value of the asphalt;
step four, adding a sticky agent into the stirred asphalt, rapidly pumping out the hot air inside the asphalt outside the device through an air pumping device, accelerating evaporation of water inside the asphalt, and discharging the asphalt through an outlet after the asphalt becomes sticky;
the device comprises a device main body (1) of the asphalt heating tank, and is characterized in that the device main body (1) of the asphalt heating tank comprises a power seat (5), one side of the power seat (5) is fixedly connected with a support column (6), the top of the power seat (5) is movably connected with a stirring device (3), the outer wall of the stirring device (3) is provided with a switch device (4), one side of the stirring device (3) is provided with an exhaust device (2), the exhaust device (2) comprises a shell (21), the bottom of the shell (21) is provided with an air inlet, the inner wall of the shell (21) is movably connected with a fan (22), one side of the fan (22) is provided with a first motor (23) and a rotating rod (24), the stirring device (3) comprises a protection tank (31), the inside of the protection tank (31) is fixedly connected with a heating pipe (32), one side of the protection tank (31) is provided with a feeding hole (33), one side of the protection tank (31) is movably connected with the inner wall of the support column (6), and the inside of the protection tank (31) is provided with a rotating column (35) and a stirring rod (36).
The inner wall of the shell (21) is movably connected with one end of a rotating rod (24), the other end of the rotating rod (24) is fixedly connected with one side output shaft of a first motor (23), the other side output shaft of the first motor (23) is fixedly connected with the inner wall of the first motor (23), a filter screen (25) is movably connected with the inner wall of the shell (21), a scraping rod (28) is movably connected with the outer wall of the filter screen (25), a telescopic rod (26) is fixedly connected with one side of the scraping rod (28), the inner wall of the telescopic rod (26) is movably connected with the outer wall of the rotating rod (24), and an elastic rod (27) is fixedly connected with one side of the scraping rod (28);
the inner wall of the protective tank (31) is movably connected with the outer wall of the stirring rod (36), the outer wall of the rotating column (35) is fixedly connected with one side of the stirring rod (36), the outer wall of the rotating column (35) is fixedly connected with a rotating rod (37), one end of the rotating rod (37) is movably connected with a rotating wheel (38), the outer wall of the rotating wheel (38) is movably connected with the inner wall of the protective tank (31), one end of the rotating column (35) is fixedly connected with a rotating device (39), one side of the rotating device (39) is fixedly connected with a second motor (34), one side of the second motor (34) is fixedly connected with one side of the supporting column (6), the rotating device (39) comprises a rotating ring (391), the inner wall of the rotating ring (391) is movably connected with a fixed ring (392), the inner wall of the rotating ring (391) is fixedly connected with a first retaining column (393), the inner wall of the fixed ring (392) is movably connected with a second retaining column (394), and one side of the second retaining column (394) is fixedly connected with an elastic ring (394);
the switch device (4) comprises a landslide (41), a movable block (42) is interactively connected to the inner wall of the landslide (41), a baffle (43) is fixedly connected to the top of the movable block (42), an elastic column (44) is fixedly connected to the bottom of the movable block (42), a fixed ring (46) is fixedly connected to the bottom of the landslide (41), an elastic column (48) is fixedly connected to the outer wall of the fixed ring (46), a groove column (47) is movably connected to the outer wall of the elastic column (48), a rotating ring (45) is fixedly connected to the outer wall of the groove column (47), and the outer wall of the rotating ring (45) is fixedly connected with the inner wall of the protective tank (31).
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| CN115200401A (en) * | 2022-06-16 | 2022-10-18 | 李秀旗 | Phase-change temperature control device |
| CN115055087A (en) * | 2022-06-16 | 2022-09-16 | 湖北工建绿色材料投资有限公司 | Asphalt stirring device and operation method |
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| CN100509962C (en) * | 2006-09-20 | 2009-07-08 | 中国铁道科学研究院金属及化学研究所 | Special emusified asphalt for railway or light underground plated non-fragment rail and production thereof |
| US9719214B1 (en) * | 2015-02-28 | 2017-08-01 | Maxam Equipment, Inc. | Liquid asphalt heating and mixing system |
| CN111408310A (en) * | 2020-03-27 | 2020-07-14 | 湖南均佳路面材料有限公司 | Asphalt mixing plant production line pollutant processing apparatus |
| CN212348520U (en) * | 2020-05-26 | 2021-01-15 | 陕西交通职业技术学院 | Pitch agitating unit is used in highway construction |
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Effective date of registration: 20230417 Address after: 610073 No. 1, floor 5, unit 1, building 28, No. 108, Jingye Road, Qingyang District, Chengdu, Sichuan Applicant after: Knowledgeable, Practical and Conscientious Industrial Co.,Ltd. Address before: Room 301, Chuanfang complex residential building, Xiyuan Road, Xishan District, Kunming, Yunnan 650100 Applicant before: Shi Qibo |
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