CN112292989A - Corn seed broadcaster for farming - Google Patents
Corn seed broadcaster for farming Download PDFInfo
- Publication number
- CN112292989A CN112292989A CN202011129615.6A CN202011129615A CN112292989A CN 112292989 A CN112292989 A CN 112292989A CN 202011129615 A CN202011129615 A CN 202011129615A CN 112292989 A CN112292989 A CN 112292989A
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- sliding
- bracket
- frame
- rotating shaft
- support
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- 240000008042 Zea mays Species 0.000 title claims description 8
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 title claims description 8
- 235000002017 Zea mays subsp mays Nutrition 0.000 title claims description 8
- 235000005822 corn Nutrition 0.000 title claims description 8
- 238000009313 farming Methods 0.000 title claims description 4
- 235000007164 Oryza sativa Nutrition 0.000 claims abstract description 12
- 235000009566 rice Nutrition 0.000 claims abstract description 12
- 241000209094 Oryza Species 0.000 claims abstract 10
- 230000005540 biological transmission Effects 0.000 claims description 8
- 238000009331 sowing Methods 0.000 abstract description 15
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 206010066054 Dysmorphism Diseases 0.000 description 6
- 239000002689 soil Substances 0.000 description 6
- 240000007594 Oryza sativa Species 0.000 description 2
- 230000002146 bilateral effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000001095 motoneuron effect Effects 0.000 description 1
Images
Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01C—PLANTING; SOWING; FERTILISING
- A01C7/00—Sowing
- A01C7/08—Broadcast seeders; Seeders depositing seeds in rows
- A01C7/085—Broadcast seeders
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Environmental Sciences (AREA)
- Sowing (AREA)
Abstract
The invention relates to an agricultural planting device, in particular to a rice seed broadcaster for agricultural planting. The invention aims to provide a paddy seed broadcaster for agricultural planting, which is convenient to move and uniform in seed broadcasting. The technical scheme is that the paddy seed broadcaster for agricultural planting comprises a first bracket; the four rollers are rotatably arranged on the periphery of the bottom of the first bracket; the servo motor is arranged on one side inside the first support; and the rotating assembly is arranged between the output shaft of the servo motor and the other side of the upper part of the first support. The automatic rice sowing machine has the beneficial effects that when people place rice seeds on the blanking frame, the blanking assembly can automatically sow the seeds on the land needing sowing under the action of the servo motor, so that the working efficiency and the operation convenience of people in sowing the seeds on the land are effectively improved, and the seeds are uniformly sown.
Description
Technical Field
The invention relates to an agricultural planting device, in particular to a rice seed broadcaster for agricultural planting.
Background
The sowing is the operation of timely sowing the seed materials into a soil layer with a certain depth according to a certain quantity and mode, the proper sowing directly influences the growth and the yield of crops, and in order to improve the sowing quality, seed treatment is required to be carried out before the sowing, and the preparation of labor, animal power, sowing machines and tools and the like is also required.
At present, when people sow seeds in the soil, seed materials are generally placed in a sieve, the seeds are scattered in the soil in a shaking mode by an arm, the scattered seeds are not uniform, the working efficiency is low, and if the soil needing to be sowed is wide, the situation of wasting time and labor can occur.
Therefore, it is particularly necessary to design a paddy seed sowing machine for agricultural planting, which is convenient to move and uniform in seed sowing, and can eliminate some troubles possibly caused by most of manual operations, so as to improve the working efficiency and solve the defects.
Disclosure of Invention
In order to overcome the defects that manual sowing can cause uneven sowing of seeds, low working efficiency and time and labor waste, the invention aims to provide the rice sowing machine for agricultural planting, which is convenient to move and uniform in sowing.
The technical scheme is as follows: a paddy seed broadcaster for agricultural planting comprises a first bracket, wherein wave sliding grooves are formed in two sides of the top of the first bracket; the four rollers are rotatably arranged on the periphery of the bottom of the first bracket; the servo motor is arranged on one side inside the first support; the rotating assembly is arranged between the output shaft of the servo motor and the other side of the upper part of the first support; the first sliding rods are symmetrically arranged at two sides inside the first support; the blanking assembly is arranged at the bottom of the first sliding rod in a sliding mode.
As the improvement of the scheme, the rotating assembly comprises a first rotating shaft, and the first rotating shaft is arranged on an output shaft of the servo motor; the first bevel gear is arranged on one side of the first rotating shaft; the support rod is arranged on one side inside the first support; the second rotating shaft is rotatably arranged on one side of the supporting rod; the second bevel gear is arranged at the bottom of the second rotating shaft, and the first bevel gear and the second bevel gear are meshed with each other; the first driving wheel is arranged at the top of the second rotating shaft; the second bracket is arranged on one side of the first bracket; the third rotating shaft is rotatably arranged on the second bracket; the second driving wheel is arranged at the top of the third rotating shaft; the first belt is wound between the first transmission wheel and the second transmission wheel; the third driving wheel is arranged at the bottom of the third rotating shaft; the third bracket is arranged at the top of one side of the first bracket; the fourth driving wheel is rotatably arranged on the other side of the third bracket; and the second belt is wound on the third driving wheel and the fourth driving wheel.
As an improvement of the scheme, the blanking assembly comprises guide sleeves, and the guide sleeves are symmetrically arranged on the left sides of the first sliding rods in a sliding manner; the supporting frame is arranged between the bottoms of the guide sleeves; the blanking frame is arranged in the supporting frame; the first contact rods are symmetrically and slidably arranged in the blanking frame, and the outer sides of the first contact rods are slidably matched with the wave sliding grooves; the supporting frames are symmetrically arranged on the supporting frame; the sliding rail is arranged between the tops of the supporting frames; the push rod is arranged outside the second belt, and the lower side of the push rod is in sliding fit with the sliding rail.
As an improvement of the scheme, the device also comprises an opening and closing assembly, wherein the opening and closing assembly comprises a second slide bar, and the two sides of the supporting frame are symmetrically connected with the second slide bar; the sliding sleeves are arranged on the second sliding rods in a sliding manner; the connecting rod is arranged between the sliding sleeves; the second contact rod is arranged between the connecting rods; the rotating plates are symmetrically and rotatably arranged on two sides of the bottom of the supporting frame; the torsion spring is connected between the outer side of the rotating plate and the supporting frame and sleeved on the rotating plate; the outer ends of the rotating plates are connected with supporting rods; the connecting rods are rotatably arranged on the outer sides of the sliding sleeves and are rotatably connected with the supporting rods; the dysmorphism frame, the dysmorphism frame sets up both sides in first support, and the second contact lever all cooperates with the dysmorphism frame.
As an improvement of the scheme, the device further comprises a press bell, and the press bell is arranged on the periphery of the inner side of the first support.
As an improvement of the scheme, the supporting frame can be detached.
As an improvement of the scheme, the blanking frame is provided with a plurality of through holes with the same size.
As a modification of the above, the height of the apparatus is 60 cm.
The invention has the beneficial effects that:
1. when people place the corn seed at the unloading frame, under servo motor's effect, the unloading subassembly can be automatic spill kind to going on needing to spill kind of land, and the effectual work efficiency that has improved people when spilling kind to the land is convenient with the operation, and spills kind evenly.
2. Under the effect of the opening and closing assembly, the discharging assembly can not scatter seeds in places where the seeds do not need to be scattered when the seeds are scattered, the working efficiency when the seeds are scattered is improved, and the waste of the seeds is effectively reduced.
3. When the bell is pressed to ring, people can be reminded to move the seed broadcaster to other places, and the working efficiency of people is effectively improved.
Drawings
Fig. 1 is a schematic perspective view of the present invention.
Fig. 2 is a schematic structural view and a cross-sectional view of a first partial body according to the present invention.
Fig. 3 is a schematic structural view and a cross-sectional view of a second partial body according to the present invention.
Fig. 4 is a perspective view of a third embodiment of the present invention.
Fig. 5 is an enlarged view of a portion a of the present invention.
Fig. 6 is a perspective view and a cross-sectional view of a fourth part of the present invention.
Number designation in the figures: 1. a first bracket, 2, a roller, 3, a servo motor, 4, a rotating component, 401, a first rotating shaft, 402, a first bevel gear, 403, a support rod, 404, a second rotating shaft, 405, a second bevel gear, 406, a first driving wheel, 407, a third rotating shaft, 408, a second driving wheel, 409, a first belt, 410, a second bracket, 411, a third driving wheel, 412, a third bracket, 414, a fourth driving wheel, 415, a second belt, 5, a wave chute, 6, the device comprises a first sliding rod, 7, a blanking assembly, 701, a guide sleeve, 702, a supporting frame, 703, a blanking frame, 704, a first contact rod, 705, a supporting frame, 706, a sliding rail, 707, a push rod, 8, an opening and closing assembly, 801, a second sliding rod, 802, a sliding sleeve, 803, a connecting rod, 804, a second contact rod, 805, a rotating plate, 806, a torsion spring, 807, a supporting rod, 808, a connecting rod, 809, a special-shaped frame, 9 and a press bell.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Example 1
The utility model provides a corn seed broadcaster for farming, as shown in figure 1, figure 2, figure 3, figure 4, figure 5 and figure 6, including first support 1, gyro wheel 2, servo motor 3, rotating assembly 4, first slide bar 6 and unloading subassembly 7, first support 1 bottom rotary type all around is equipped with gyro wheel 2, first support 1 inside left side is equipped with servo motor 3, be equipped with rotating assembly 4 between servo motor 3's the output shaft and the first support 1 upper portion left side, both sides are opened around first support 1 top has wave spout 5, the longitudinal symmetry is equipped with first slide bar 6 between the inside left and right sides of first support 1, first slide bar 6 bottom slidingtype is equipped with unloading subassembly 7.
People move this device to suitable position through gyro wheel 2, place the corn seed in unloading subassembly 7, start servo motor 3, servo motor 3's output shaft can drive rotating assembly 4 work, rotating assembly 4 can shake from top to bottom along wave spout 5, rotating assembly 4 can drive unloading subassembly 7 work, unloading subassembly 7 can be through 6 horizontal slideings of first slide bar, thereby the completion is to the work of broadcasting seeds of soil, after the work is accomplished, close servo motor 3 can.
Example 2
Based on embodiment 1, as shown in fig. 2, 3, 4, 5 and 6, the rotating assembly 4 includes a first rotating shaft 401, a first bevel gear 402, a support rod 403, a second rotating shaft 404, a second bevel gear 405, a first driving wheel 406, a third rotating shaft 407, a second driving wheel 408, a first belt 409, a second support 410, a third driving wheel 411, a third support 412, a fourth driving wheel 414 and a second belt 415, the output shaft of the servo motor 3 is provided with the first rotating shaft 401, the right side of the first rotating shaft 401 is provided with the first bevel gear 402, the left side of the interior of the first support 1 is provided with the support rod 403, the right side of the support rod 403 is rotatably provided with the second rotating shaft 404, the bottom of the second rotating shaft 404 is provided with the second bevel gear 405, the first bevel gear 402 is engaged with the second bevel gear 405, the top of the second rotating shaft 404 is provided with the first driving wheel 406, the left side of the first support 1 is provided with, the second bracket 410 is rotatably provided with a third rotating shaft 407, the top of the third rotating shaft 407 is provided with a second driving wheel 408, a first belt 409 is wound between the first driving wheel 406 and the second driving wheel 408, the bottom of the third rotating shaft 407 is provided with a third driving wheel 411, the top of the right side of the first bracket 1 is provided with a third bracket 412, the left side of the third bracket 412 is rotatably provided with a fourth driving wheel 414, and the third driving wheel 411 and the fourth driving wheel 414 are wound with a second belt 415.
When people start the servo motor 3, the output shaft of the servo motor 3 can drive the first rotating shaft 401 to rotate, the first rotating shaft 401 can drive the first bevel gear 402 to rotate, the first bevel gear 402 can drive the second bevel gear 405 to rotate, the second bevel gear 405 can drive the second rotating shaft 404 to rotate, the second rotating shaft 404 can drive the first driving wheel 406, the first belt 409 and the second driving wheel 408 to rotate, the second driving wheel 408 can drive the third rotating shaft 407 to rotate, and the third rotating shaft 407 can drive the third driving wheel 411, the fourth driving wheel 414 and the second belt 415 to rotate.
The blanking assembly 7 comprises a guide sleeve 701, a support frame 702, a blanking frame 703, a first contact rod 704, a support frame 705, a sliding rail 706 and a push rod 707, the guide sleeve 701 is symmetrically and slidably arranged on the left side of the first sliding rod 6, the support frame 702 is arranged between the bottoms of the guide sleeve 701, the blanking frame 703 is slidably arranged inside the support frame 702, the first contact rod 704 is arranged on the front side and the rear side in the blanking frame 703, the outer side of the first contact rod 704 is in sliding fit with the wave sliding groove 5, the support frame 705 is symmetrically arranged on the front side and the rear side of the upper side of the support frame 702, the sliding rail 706 is arranged between the tops of the support frames 705, the push rod 707 is arranged on the outer side of the.
People place the corn seed in unloading frame 703, when rotating assembly 4 during operation, second belt 415 can drive push rod 707 to remove, when push rod 707 moves about, push rod 707 can drive support frame 705 and slide rail 706 and move about, when push rod 707 back-and-forth movement, push rod 707 can slide along slide rail 706 inboard, support frame 705 can drive support frame 702 and unloading frame 703 and move about, first contact bar 704 can reciprocate in wave spout 5, thereby drive unloading frame 703 and constantly reciprocate, make its inside corn seed can drop better, thereby carry out the work of broadcasting seeds to the soil.
Still including the subassembly 8 that opens and shuts, subassembly 8 that opens and shuts is including second slide bar 801, sliding sleeve 802, connecting rod 803, second contact bar 804, commentaries on classics board 805, torsion spring 806, bracing piece 807, connecting rod 808 and dysmorphism frame 809, the equal bilateral symmetry in both sides is connected with second slide bar 801 around the carriage 702, all slidingly be equipped with sliding sleeve 802 on the second slide bar 801, be equipped with connecting rod 803 between the sliding sleeve 802, connecting rod 803 middle part is equipped with second contact bar 804, carriage 702 bottom bilateral symmetry rotary type is equipped with commentaries on classics board 805, all be connected with torsion spring 806 between the outside of commentaries on classics board 805 and the carriage 702, both ends all are connected with bracing piece 807 around commentaries on classics board 805, the equal rotary type in sliding sleeve 802 outside is equipped with connecting rod 808, connecting rod 808 and bracing piece rotary type are connected, first support 1 inboard fore-and aft symmetry.
When unloading subassembly 7 slided left, second contact pole 804 can upwards slide through dysmorphism frame 809 orbit, second contact pole 804 can drive sliding sleeve 802 rebound, second slide bar 801 can drive connecting rod 808 and rotate, connecting rod 808 can drive bracing piece 807 and rotate, bracing piece 807 makes torsion spring 806 take place deformation, thereby drive commentaries on classics board 805 and rotate, commentaries on classics board 805 at this moment can be opened, the seed in unloading frame 703 can spill out, when second contact pole 804 slides downwards through dysmorphism frame 809 orbit, under torsion spring 806's reset action, commentaries on classics board 805 can be closed, thereby accomplish the work of broadcasting seeds.
The support also comprises a press bell 9, and the press bell 9 is arranged on the periphery of the inner side of the first support 1.
When the supporting frame 702 slides left and right to the two sides of the device, the supporting frame can contact with the pressing bell 9, the pressing bell 9 can automatically sound, people can turn off the servo motor 3 at the moment, and move the seed broadcaster to other places.
It should be understood that the above description is for illustrative purposes only and is not meant to limit the present invention. Those skilled in the art will appreciate that variations of the present invention are intended to be included within the scope of the claims herein.
Claims (8)
1. The utility model provides a corn seed broadcaster for farming, characterized by, including:
the wave sliding grooves (5) are arranged on two sides of the top of the first support (1);
the rollers (2) are rotatably arranged around the bottom of the first support (1), and the number of the rollers is four;
the servo motor (3), the servo motor (3) is arranged on one side inside the first support (1);
the rotating assembly (4), the rotating assembly (4) is arranged between the output shaft of the servo motor (3) and the other side of the upper part of the first bracket (1);
the first sliding rods (6), the first sliding rods (6) are symmetrically arranged at two sides inside the first bracket (1);
the blanking assembly (7) is arranged at the bottom of the first sliding rod (6) in a sliding mode.
2. An agricultural planting rice seed broadcaster according to claim 1, wherein the rotating assembly (4) comprises:
the first rotating shaft (401), the first rotating shaft (401) is set in the output shaft of the servomotor (3);
the first bevel gear (402), the first bevel gear (402) is set up in one side of the first spindle (401);
the supporting rod (403), the supporting rod (403) is arranged on one side inside the first bracket (1);
the second rotating shaft (404), the second rotating shaft (404) is rotatably arranged on one side of the supporting rod (403);
the second bevel gear (405), the second bevel gear (405) is arranged at the bottom of the second rotating shaft (404), and the first bevel gear (402) and the second bevel gear (405) are meshed with each other;
the first driving wheel (406), the first driving wheel (406) is arranged at the top of the second rotating shaft (404);
the second bracket (410), the second bracket (410) is set up in the other side of the first bracket (1);
the third rotating shaft (407), the third rotating shaft (407) is set on the second bracket (410) rotatably;
the second transmission wheel (408), the second transmission wheel (408) is arranged on the top of the third rotating shaft (407);
a first belt (409), the first belt (409) being wound between the first transmission wheel (406) and the second transmission wheel (408);
the third transmission wheel (411), the third transmission wheel (411) is set up in the third spindle (407) bottom;
the third bracket (412), the third bracket (412) is arranged on the top of one side of the first bracket (1);
the fourth driving wheel (414), the fourth driving wheel (414) is rotatably arranged on one side of the third bracket (412);
a second belt (415), the second belt (415) is wound on the third driving wheel (411) and the fourth driving wheel (414).
3. An agricultural planting rice seed broadcaster as claimed in claim 2, wherein said blanking assembly (7) comprises:
the guide sleeves (701) are symmetrically and slidably arranged on the first sliding rod (6);
the supporting frame (702), the supporting frame (702) is arranged between the bottoms of the guide sleeves (701);
the blanking frame (703) is arranged in the supporting frame (702) in a sliding manner;
the first contact rods (704) are symmetrically arranged in the blanking frame (703), and the outer sides of the first contact rods (704) are in sliding fit with the wave sliding grooves (5);
the supporting frame (705), the supporting frame (705) is symmetrically arranged on the supporting frame (702);
the sliding rail (706), the sliding rail (706) is arranged between the tops of the supporting frames (705);
and the push rod (707) is arranged on the outer side of the second belt (415), and the lower side of the push rod (707) is in sliding fit with the sliding rail (706).
4. A paddy rice seed broadcaster for agricultural planting according to claim 3, further comprising an opening and closing member (8), wherein the opening and closing member (8) comprises:
the two sides of the support frame (702) are symmetrically connected with the second sliding rod (801);
the sliding sleeve (802) is arranged on the second sliding rod (801) in a sliding manner;
the connecting rods (803), the connecting rods (803) are arranged between the sliding sleeves (802);
a second contact rod (804), the second contact rod (804) being disposed between the connection rods (803);
the rotating plates (805) are symmetrically and rotatably arranged on two sides of the bottom of the supporting frame (702);
the torsion spring (806), the torsion spring (806) is connected between the outside of the rotating plate (805) and the supporting frame (702), and the torsion spring (806) is sleeved on the rotating plate (805);
the outer ends of the supporting rods (807) and the rotating plate (805) are connected with the supporting rods (807);
the connecting rods (808) are rotatably arranged on the outer sides of the sliding sleeves (802), and the connecting rods (808) are rotatably connected with the supporting rods (807);
the special-shaped frame (809), the special-shaped frame (809) is arranged on two sides in the first support (1), and the second contact rods (804) are matched with the special-shaped frame (809).
5. An agricultural planting rice seed spreader according to claim 4, further comprising a press bell (9), wherein the press bell (9) is disposed around the inner side of the first support (1).
6. An agricultural planting rice seed broadcaster in accordance with claim 3, wherein the support frame (702) is detachable.
7. A rice seed broadcaster for agricultural planting according to claim 4, wherein: the blanking frame (703) is provided with a plurality of through holes with the same size.
8. A rice seed broadcaster for agricultural planting according to claim 1, wherein: the height of the apparatus was 60 cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011129615.6A CN112292989A (en) | 2020-10-21 | 2020-10-21 | Corn seed broadcaster for farming |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011129615.6A CN112292989A (en) | 2020-10-21 | 2020-10-21 | Corn seed broadcaster for farming |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112292989A true CN112292989A (en) | 2021-02-02 |
Family
ID=74326775
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011129615.6A Pending CN112292989A (en) | 2020-10-21 | 2020-10-21 | Corn seed broadcaster for farming |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112292989A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113597863A (en) * | 2021-08-06 | 2021-11-05 | 谢丽梅 | Intelligent agricultural automatic fertilization equipment |
| CN117084025A (en) * | 2023-10-19 | 2023-11-21 | 安徽农业大学 | Wheat spring-cold test seeding device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001016912A (en) * | 1999-07-08 | 2001-01-23 | Yamamoto Co Ltd | Method for sowing and raising seedling |
| CN104938103A (en) * | 2015-05-29 | 2015-09-30 | 安徽浮山现代家庭农场有限公司 | Numerically controlled agricultural automatic sowing rack |
| TWM546660U (en) * | 2017-05-04 | 2017-08-11 | Chen-Rong Fan | Tray delivery device for sowing machine |
| CN110663321A (en) * | 2019-11-11 | 2020-01-10 | 何谷超 | Automatic guide rail type millet seed scattering device with uniform subdivision |
| CN211359582U (en) * | 2020-01-02 | 2020-08-28 | 林雪玲 | Seed screening machine with adjustable aperture |
-
2020
- 2020-10-21 CN CN202011129615.6A patent/CN112292989A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001016912A (en) * | 1999-07-08 | 2001-01-23 | Yamamoto Co Ltd | Method for sowing and raising seedling |
| CN104938103A (en) * | 2015-05-29 | 2015-09-30 | 安徽浮山现代家庭农场有限公司 | Numerically controlled agricultural automatic sowing rack |
| TWM546660U (en) * | 2017-05-04 | 2017-08-11 | Chen-Rong Fan | Tray delivery device for sowing machine |
| CN110663321A (en) * | 2019-11-11 | 2020-01-10 | 何谷超 | Automatic guide rail type millet seed scattering device with uniform subdivision |
| CN211359582U (en) * | 2020-01-02 | 2020-08-28 | 林雪玲 | Seed screening machine with adjustable aperture |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113597863A (en) * | 2021-08-06 | 2021-11-05 | 谢丽梅 | Intelligent agricultural automatic fertilization equipment |
| CN117084025A (en) * | 2023-10-19 | 2023-11-21 | 安徽农业大学 | Wheat spring-cold test seeding device |
| CN117084025B (en) * | 2023-10-19 | 2024-01-02 | 安徽农业大学 | Wheat spring-cold test seeding device |
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Application publication date: 20210202 |
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