CN112452699A - Screening plant for soil sampling - Google Patents
Screening plant for soil sampling Download PDFInfo
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- CN112452699A CN112452699A CN202011221135.2A CN202011221135A CN112452699A CN 112452699 A CN112452699 A CN 112452699A CN 202011221135 A CN202011221135 A CN 202011221135A CN 112452699 A CN112452699 A CN 112452699A
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- tray
- outer barrel
- plate
- rotating
- screening
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/08—Screens rotating within their own plane
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/42—Drive mechanisms, regulating or controlling devices, or balancing devices, specially adapted for screens
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B2201/00—Details applicable to machines for screening using sieves or gratings
- B07B2201/04—Multiple deck screening devices comprising one or more superimposed screens
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Combined Means For Separation Of Solids (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention provides a screening device for soil sampling, which comprises an outer barrel, wherein a filtering mechanism is arranged at the top in the outer barrel, a plurality of layers of screening mechanisms are arranged below the filtering mechanism, each layer of screening mechanism comprises four dividing barrels, the four dividing barrels are fixedly arranged in the outer barrel and are uniformly divided into four channels, each channel is communicated with the upper part and the lower part of the outer barrel, a tray is arranged at the bottom of each four dividing barrel, four cavities are uniformly arranged on the four dividing barrels above each tray, two diagonal cavities are provided with bottom plates, one side of each tray is rotatably connected to the outer wall of the outer barrel, a screening disc is arranged between every two screening mechanisms and is rotatably connected into the outer barrel, the screening disc is connected with the outer barrel through a rotating mechanism, a chassis is movably connected to the bottom of the outer barrel, a feeding channel is arranged at the upper part. The invention has the beneficial effects that: reasonable in design, simple structure, safe and reliable can sieve soil sample fast, increases screening efficiency, saves time and manpower.
Description
Technical Field
The invention relates to the technical field of soil detection equipment, in particular to a screening device for soil sampling.
Background
The quartering method is a sampling method commonly adopted in material preparation or material tests, and comprises the steps of stacking materials to be sampled on a plane, bisecting the materials into four parts of materials positioned in four quadrants through a flat plate or other auxiliary tools, mixing the materials of two diagonal quadrant parts to form two parts of materials to be sampled, taking one part of the materials, repeatedly tiling, equally dividing the four parts of the materials and mixing the materials of the diagonal quadrant parts, and after multiple times of sampling, realizing the purpose of shrinking and separating samples which meet requirements and can represent material characteristics from the materials to be sampled. Most of the existing quartering sampling methods are implemented through manual screening by workers, so that time and labor are wasted, and the efficiency is low.
How to solve the above technical problems is the subject of the present invention.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides the screening device for soil sampling, which is reasonable in design, simple in structure, safe and reliable and can be used for rapidly screening the soil sample.
The technical scheme adopted by the invention for solving the technical problems is as follows: the invention provides a screening device for soil sampling, which comprises an outer barrel, wherein a filtering mechanism is arranged at the inner top of the outer barrel, and a plurality of layers of screening mechanisms are arranged below the filtering mechanism;
each layer of screening mechanism comprises a quartering drum which is fixedly arranged in the outer drum, the quartering drum is uniformly divided into four channels, and each channel is communicated with the upper part and the lower part of the outer drum;
the bottom of each four-divided cylinder is provided with a tray, four cavities are uniformly arranged on the four-divided cylinder above each tray, two diagonal cavities are provided with bottom plates, and one side of each tray is rotatably connected to the outer wall of the outer cylinder;
a screening disc is arranged between every two screening mechanisms, the screening disc is rotatably connected in the outer barrel, and the screening disc is connected with the outer barrel through a rotating mechanism;
the bottom of the outer barrel is movably connected with a chassis, the upper part of the outer barrel is provided with a feeding channel, and the feeding channel is positioned above the filtering mechanism.
The outer barrel is hollow and cylindrical, the top of the outer barrel is closed, the bottom of the outer barrel is open, and the bottom of the outer barrel is connected with the chassis through threads;
the feed channel is located the urceolus one side is close to the top department, feed channel is located the outer one end tip of urceolus is for opening hourglass shape.
The quartering cylinder comprises a longitudinal cross-shaped partition plate, and the top edge of the partition plate is in a knife edge shape.
The tray comprises an outer ring, and a cross plate corresponding to the partition plate is arranged in the outer ring;
a vertical rotating shaft is arranged on the outer side of the outer barrel, a connecting ring is rotatably connected to the outer side of the outer ring of the tray outside the rotating shaft, and external teeth are arranged outside the connecting ring;
the outer side of the outer barrel is parallel to the rotating shaft and is provided with a first gear, the first gear is meshed with the outer teeth of the connecting ring, the first gear is coaxially connected with a driving motor, and the driving motor is electrically connected with a switch.
The outer barrel is connected with the tray, a barrel wall is not arranged at the position of the tray, the diameter of the outer ring is the same as that of the outer barrel, when the tray rotates to the position which is located on the same axis with the outer barrel, the top surface of the tray is attached to the bottom surface of the four-section barrel, and the top surface of the tray cross plate is attached to the bottom surface of the partition plate.
The sieve tray comprises a sieve plate, the sieve plate is horizontally arranged and is coaxial with the outer barrel, and a plurality of sieve holes penetrating through the sieve plate up and down are uniformly formed in the sieve plate;
encircle be provided with round gear ring outside the sieve, gear ring with urceolus coaxial rotation is connected and the gear is located the urceolus outside, gear ring meshing have set up in the outside vertical second gear of urceolus, the second gear is through coaxial driving motor drive rotation.
The filtering mechanism comprises a circular sieve box at the bottom, and the sieve box comprises a bottom plate with uniformly distributed sieve pores and a box wall surrounding the bottom plate;
the top of the box wall is fixedly connected with a plurality of supporting rods, the top ends of the supporting rods are fixedly connected with a rotating ring, and the rotating ring and the screen box are coaxial;
the center of the rotating ring is rotatably connected with a cross-shaped connecting piece, the connecting piece comprises four cylindrical end points, two symmetrical end points are rotatably connected with the rotating ring, the other two symmetrical end points are rotatably connected with a fixed frame, and the fixed frame is fixedly connected to the middle part of the inner wall of the top plate of the outer barrel;
the rotating part comprises a rotating drum which is coaxially and rotatably connected to the outer drum, one side of the rotating drum is fixedly connected with a rotating plate, and the rotating plate is connected with the connecting piece through a movable frame;
the movable frame comprises a movable ball at the top end, the movable ball is spherically connected with the rotating plate, and the bottom end of the movable frame is fixedly connected with the rotating ring and is respectively and rotatably connected with two symmetrical end points of the connecting piece;
the rotary drum is driven to rotate by a driving motor.
The feeding channel is characterized in that a feed opening at one end in the outer barrel is positioned above the sieve box.
The mesh of the screen box is the same as the mesh of the screen plate in diameter.
When the invention is actually used: the soil sample is fed from the feeding channel, the sample enters the outer barrel through the feeding channel and falls into the sieve box, the sieve box is driven by the driving motor to rotate ceaselessly in the outer barrel, the soil sample can be filtered and then fall into the sieving mechanism below, the soil sample can be divided into four parts through the quartering barrel and then fall into the tray below, two parts of the four parts of the sample at opposite angles in the tray are located in the tray, the other two parts of the sample continue to fall into the rotating sieve tray, the sample can uniformly fall into the sieving mechanism below for continuous sieving due to the ceaseless rotation of the sieve tray, the sample after multiple sieving finally falls into the chassis, the chassis can be taken down to collect the sieved sample, and the sieved soil in the tray can rotate out of the outer barrel through the driving motor and is cleaned.
The invention has the beneficial effects that: the structure is simple, the design is reasonable, soil samples can be screened by arranging the filtering mechanism and the multilayer screening mechanism, the filtering mechanism comprises a rotating part and a bottom screening box, the soil samples can be effectively filtered by the rotation of the screening box after entering the screening box, the screening mechanism comprises a quartering cylinder and a bottom tray, the quartering cylinder divides the samples into four parts, two parts of the samples which can take opposite angles after falling into the lower tray can fall into the lower screening mechanism for continuous screening, the tray can rotate out of the outer cylinder for soil cleaning, a screening disc is arranged between every two screening mechanisms, the screening disc can continuously rotate, the samples falling from the upper part can be rotatably filtered, the falling samples can uniformly continue to fall, the top edge of the partition plate of the quartering cylinder is arranged in a knife edge shape, the soil can be prevented from being accumulated at the top of the partition plate, the bottom of the outer cylinder is provided with a base plate, the screened samples can be taken out, this device convenient to use only needs the staff with the sample input feed channel alright, labour saving and time saving effectively improves screening efficiency.
Drawings
Fig. 1 is a front view of the present invention.
Fig. 2 is a schematic perspective view of the tray of the present invention when it is rolled out.
FIG. 3 is a schematic structural view of the sieving mechanism and the sieving plate inside the outer cylinder according to the present invention.
Fig. 4 is a schematic perspective view of the filter mechanism of the present invention.
Wherein the reference numerals are: 1. an outer cylinder; 101. a first gear; 102. a second gear; 2. dividing into barrels; 201. a partition plate; 3. a tray; 301. an outer ring; 302. a cross plate; 303. a connecting ring; 304. an outer tooth; 4. a sieve tray; 401. a sieve plate; 402. a gear ring; 5. a chassis; 6. a feed channel; 7. a screen box; 701. a strut; 8. a rotating ring; 801. a connecting member; 9. a fixed mount; 901. a rotating member; 902. a rotating plate; 10. a movable frame; 1001. a movable ball.
Detailed Description
Technical characteristics of the scheme can be clearly explained, and the scheme is explained through a specific implementation mode.
Referring to fig. 1 to 4, this embodiment is a screening plant for soil sampling, including urceolus 1, urceolus 1 is hollow cylindric, the top is closed, the bottom is open, urceolus 1 bottom swing joint has chassis 5, there is chassis 5 bottom through threaded connection, urceolus 1 upper portion is provided with feedstock channel 6, feedstock channel 6 is located the filter equipment top, feedstock channel 6 is located urceolus 1 one side and is close to top department, feedstock channel 6 is located the outer one end tip of urceolus 1 and is for the open hourglass hopper-shaped, the one end feed opening in feedstock channel 6 urceolus 1 is located sieve box 7 top.
The top in the outer barrel 1 is provided with a filtering mechanism, the filtering mechanism comprises a circular sieve box 7 at the bottom, the sieve box 7 comprises a bottom plate and a box wall, the bottom plate is uniformly provided with sieve holes, the box wall is surrounded by the bottom plate, the top of the box wall is fixedly connected with a plurality of support rods 701, the top ends of the support rods 701 are fixedly connected with a rotating ring 8, the rotating ring 8 and the sieve box 7 are coaxial, the center of the rotating ring 8 is rotatably connected with a cross-shaped connecting piece 801, the connecting piece 801 comprises four cylindrical end points, two symmetrical end points are rotatably connected with the rotating ring 8, the other two symmetrical end points are rotatably connected with a fixed frame 9, the fixed frame 9 is fixedly connected with the middle part of the top plate of the outer barrel 1, the center of the top plate of the outer barrel 1 is rotatably connected with a rotating piece 901, the rotating piece 901 comprises a rotating, the movable ball 1001 is connected with the rotating plate 902 in a spherical manner, the bottom end of the movable frame 10 is fixedly connected with the rotating ring 8 and is respectively connected with two symmetrical end points of the connecting piece 801 in a rotating manner, and the rotating drum is driven to rotate by the driving motor.
A plurality of layers of screening mechanisms are arranged below the filtering mechanism, each layer of screening mechanism comprises a four-layer cylinder 2, the four-layer cylinders 2 are fixedly arranged in the outer cylinder 1, the four-layer cylinders 2 are evenly divided into four channels, each channel is communicated with the upper portion and the lower portion of the outer cylinder 1, each four-layer cylinder 2 comprises a longitudinal cross-shaped partition plate 201, and the top edge of each partition plate 201 is in a knife edge shape.
Every four divide a section of thick bamboo 2 bottoms all to be provided with tray 3, every tray 3 corresponds four cavities of four minutes section of thick bamboos 2 of top, wherein two diagonal angle cavities are provided with the bottom plate, one side of tray 3 is rotated and is connected in 1 outer wall of urceolus, tray 3 includes outer loop 301, be provided with the cross 302 that corresponds with baffle 201 in the outer loop 3, the 1 outside of urceolus is provided with vertical pivot, the pivot is outer to be rotated and is connected with the go-between 303 in the 3 outer loop 301 outsides of tray, go-between 303 is provided with external tooth 304 outward, the 1 outside of urceolus and pivot parallel arrangement have first gear 101, first gear 101 meshes with the external tooth 304 of go-between 303, first gear 101 coaxial coupling has driving motor.
The sieve tray 4 is arranged between every two sieving mechanisms, the sieve tray 4 is rotatably connected in the outer barrel 1, the sieve tray 4 is connected with the outer barrel 1 through a rotating mechanism, the position of the outer barrel 1, which is connected with the tray 3, is not provided with a barrel wall, the diameter of the outer ring 301 is the same as that of the outer barrel 1, when the tray 3 rotates to be positioned at the same axis with the outer barrel 1, the top surface of the tray 3 is attached to the bottom surface of the four-divided barrel 2, the top surface of the cross plate 302 of the tray 3 is attached to the bottom surface of the partition plate 201, the sieve tray 4 comprises a sieve plate 401, the sieve plate 401 is horizontally arranged and coaxially arranged with the outer barrel 1, a plurality of sieve holes penetrating through the sieve plate 401 are uniformly arranged on the sieve plate 401, a circle of gear ring 402 is arranged outside the sieve plate 401, the gear ring 402 is coaxially rotatably connected with the outer barrel 1 and the gear is positioned outside the outer barrel 1, the, the mesh of the screen box 7 is the same as the mesh diameter of the screen plate 4.
When the invention is actually used: the soil sample is put into the outer barrel 1 through the feeding channel 6 and falls into the sieve box 7, the sieve box 7 is driven by the driving motor to rotate in the outer barrel 1 ceaselessly, the soil sample can be filtered and then fall into the sieving mechanism below, the soil sample can fall into the tray 3 below after being divided into four parts through the quartering barrel 2, two parts of the four parts of the sample in the tray 3 at opposite angles are located in the tray 3, the other two parts of the sample continue to fall into the rotating sieve tray 4, the sample can uniformly fall into the sieving mechanism below to continue to be sieved due to the ceaseless rotation of the sieve tray 4, the sample after multiple sieving finally falls into the chassis 5, the chassis 5 can be taken down to collect the sieved sample, and the sieved soil in the tray 3 can be rotated out of the outer barrel 1 through the driving motor and cleaned.
The technical features of the present invention which are not described in the above embodiments may be implemented by or using the prior art, and are not described herein again, of course, the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and variations, modifications, additions or substitutions which may be made by those skilled in the art within the spirit and scope of the present invention should also fall within the protection scope of the present invention.
Claims (9)
1. The screening device for soil sampling is characterized by comprising an outer barrel (1), wherein a filtering mechanism is arranged at the inner top of the outer barrel (1), and a plurality of layers of screening mechanisms are arranged below the filtering mechanism;
each layer of screening mechanism comprises a four-layer cylinder (2), the four-layer cylinder (2) is fixedly arranged in the outer cylinder (1), the four-layer cylinder (2) is uniformly divided into four channels, and each channel is communicated with the upper part and the lower part of the outer cylinder (1);
the bottom of each four-split cylinder (2) is provided with a tray (3), four cavities are uniformly arranged on the four-split cylinder (2) above each tray (3), two diagonal cavities are provided with bottom plates, and one side of each tray (3) is rotatably connected to the outer wall of the outer cylinder (1);
a screening disc (4) is arranged between every two screening mechanisms, the screening disc (4) is rotatably connected in the outer barrel (1), and the screening disc (4) is connected with the outer barrel (1) through a rotating mechanism;
the bottom of the outer barrel (1) is movably connected with a chassis (5), a feeding channel (6) is arranged on the upper portion of the outer barrel (1), and the feeding channel (6) is located above the filtering mechanism.
2. A screening device for soil sampling according to claim 1, wherein said outer cylinder (1) is hollow cylindrical, the top is closed, the bottom is open, and the bottom is connected with said base plate (5) by screw thread;
the feeding channel (6) is located one side of the outer barrel (1) is close to the top, and the feeding channel (6) is located at one end outside the outer barrel (1) and is in an open funnel shape.
3. A soil sampling screening device according to claim 1, wherein the quartering drum (2) comprises a longitudinal cross-shaped partition (201), the top edge of the partition (201) being knife-edge shaped.
4. A soil sampling screening device according to claim 1, characterized in that said tray (3) comprises an outer ring (301), inside said outer ring (3) there is provided a cross plate (302) corresponding to said partition (201);
a vertical rotating shaft is arranged on the outer side of the outer cylinder (1), a connecting ring (303) on the outer side of an outer ring (301) of the tray (3) is rotatably connected to the outer side of the rotating shaft, and outer teeth (304) are arranged outside the connecting ring (303);
the outer side of the outer barrel (1) is provided with a first gear (101) in parallel with the rotating shaft, the first gear (101) is meshed with the outer teeth (304) of the connecting ring (303), the first gear (101) is coaxially connected with a driving motor, and the driving motor is electrically connected with a switch.
5. A screening device for soil sampling according to claim 4, characterized in that no cylindrical wall is arranged at the position where the outer cylinder (1) is connected with the tray (3), the diameter of the outer ring (301) is the same as that of the outer cylinder (1), when the tray (3) rotates to be located at the same axis with the outer cylinder (1), the top surface of the tray (3) is attached to the bottom surface of the quartering cylinder (2), and the top surface of the cross plate (302) of the tray (3) is attached to the bottom surface of the partition plate (201).
6. A screening device for soil sampling according to claim 1, wherein the screen tray (4) comprises a screen plate (401), the screen plate (401) is horizontally arranged and is coaxially arranged with the outer cylinder (1), and a plurality of screen holes penetrating the screen plate (401) up and down are uniformly arranged on the screen plate (401);
encircle sieve board (401) are provided with round ring gear (402) outward, ring gear (402) with urceolus (1) coaxial rotation is connected and the gear is located urceolus (1) outside, ring gear (402) meshing have set up in urceolus (1) outside vertical second gear (102), second gear (102) rotate through coaxial driving motor drive.
7. A soil sampling screening device according to claim 1, wherein said filtering means comprises a bottom circular screen box (7), said screen box (7) comprising a bottom plate with uniformly arranged screen holes and a box wall surrounding said bottom plate;
the top of the box wall is fixedly connected with a plurality of supporting rods (701), the top ends of the supporting rods (701) are fixedly connected with a rotating ring (8), and the rotating ring (8) and the sieve box (7) are coaxial;
the center of the rotating ring (8) is rotatably connected with a cross-shaped connecting piece (801), the connecting piece (801) comprises four cylindrical end points, two symmetrical end points are rotatably connected to the rotating ring (8), the other two symmetrical end points are rotatably connected with a fixing frame (9), and the fixing frame (9) is fixedly connected to the middle part of the inner wall of the top plate of the outer barrel (1);
a rotating part (901) is rotatably connected to the center of the inner wall of the top plate of the outer barrel (1), the rotating part (901) comprises a rotating barrel which is coaxially and rotatably connected to the outer barrel (1), a rotating plate (902) is fixedly connected to one side of the rotating barrel, and the rotating plate (902) is connected with the connecting piece (801) through a movable frame (10);
the movable frame (10) comprises a movable ball (1001) at the top end, the movable ball (1001) is spherically connected with the rotating plate (902), and the bottom end of the movable frame (10) is fixedly connected with the rotating ring (8) and is respectively and rotatably connected with two symmetrical end points of the connecting piece (801);
the rotary drum is driven to rotate by a driving motor.
8. A soil sampling screening device according to claim 7, wherein a feed opening at one end of the feed channel (6) within the outer barrel (1) is located above the screen box (7).
9. A soil sampling screening device according to claim 7, wherein the mesh of the screen box (7) is the same size as the mesh of the screen tray (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011221135.2A CN112452699A (en) | 2020-11-05 | 2020-11-05 | Screening plant for soil sampling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011221135.2A CN112452699A (en) | 2020-11-05 | 2020-11-05 | Screening plant for soil sampling |
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| CN112452699A true CN112452699A (en) | 2021-03-09 |
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| CN202011221135.2A Withdrawn CN112452699A (en) | 2020-11-05 | 2020-11-05 | Screening plant for soil sampling |
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| CN110369280A (en) * | 2019-07-23 | 2019-10-25 | 何平姣 | A kind of swing type drying tea leaves screening all-in-one machine |
| CN211120594U (en) * | 2019-09-30 | 2020-07-28 | 渭源县德园堂药业有限公司 | Supporter for chinese-medicinal material drying cabinet |
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Application publication date: 20210309 |