CN111165122A - Walnut is planted with fertilization equipment of digging pit - Google Patents

Walnut is planted with fertilization equipment of digging pit Download PDF

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Publication number
CN111165122A
CN111165122A CN202010056582.0A CN202010056582A CN111165122A CN 111165122 A CN111165122 A CN 111165122A CN 202010056582 A CN202010056582 A CN 202010056582A CN 111165122 A CN111165122 A CN 111165122A
Authority
CN
China
Prior art keywords
fixedly connected
electric telescopic
soil
telescopic rod
sleeve
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.)
Withdrawn
Application number
CN202010056582.0A
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Chinese (zh)
Inventor
吴正平
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Chongqing Kaizhou Guanghong Planting And Breeding Family Farm
Original Assignee
Chongqing Kaizhou Guanghong Planting And Breeding Family Farm
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Chongqing Kaizhou Guanghong Planting And Breeding Family Farm filed Critical Chongqing Kaizhou Guanghong Planting And Breeding Family Farm
Priority to CN202010056582.0A priority Critical patent/CN111165122A/en
Publication of CN111165122A publication Critical patent/CN111165122A/en
Withdrawn legal-status Critical Current

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    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01CPLANTING; SOWING; FERTILISING
    • A01C5/00Making or covering furrows or holes for sowing, planting or manuring
    • A01C5/04Machines for making or covering holes for sowing or planting
    • A01C5/045Machines for making or covering holes for sowing or planting with piercing buckets
    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01CPLANTING; SOWING; FERTILISING
    • A01C15/00Fertiliser distributors
    • A01C15/02Fertiliser distributors for hand use

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  • Life Sciences & Earth Sciences (AREA)
  • Soil Sciences (AREA)
  • Environmental Sciences (AREA)
  • Transplanting Machines (AREA)

Abstract

The invention discloses a digging and fertilizing device for walnut planting, which comprises a vehicle body, wherein one side of the vehicle body is fixedly connected with a supporting plate, the other side of the supporting plate is fixedly connected with a first electric telescopic rod, the bottom end of the first electric telescopic rod is fixedly connected with a connecting frame, and the bottom end of the connecting frame is provided with a soil taking mechanism. According to the invention, under the action of the soil taking mechanism, the second electric telescopic rod is contracted by starting the second electric telescopic rod, the second movable hinge drives the supporting cross rod, the second supporting cross rod upwards orbits by taking the third movable hinge as a fulcrum, so that the soil taking shovel is opened, an external power supply of the motor is switched on to drive the auger stem to rotate, the first electric telescopic rod is started to enable the auger stem to descend for drilling, when the auger stem drills to a certain depth, the second electric telescopic rod is started again to enable the soil taking shovel to be closed, drilled soil can be taken away from a pit, the area of the pit can be enlarged, and after a tree is planted, the soil taking shovel is opened to scatter soil into the root of the tree.

Description

Walnut is planted with fertilization equipment of digging pit
Technical Field
The invention belongs to the technical field of agricultural machinery, and particularly relates to a digging and fertilizing device for walnut planting.
Background
The walnut planting method has the advantages that pit digging and soil covering equipment is needed when walnuts are planted, in actual production and life, pits need to be dug on the soil in many application scenes, soil is backfilled again after certain work is carried out, the previous pit digging and soil covering is completely carried out by manpower, the efficiency is low, time and labor are wasted, the current situation can be changed along with the occurrence of industrial machinery, and the working efficiency is greatly improved.
The existing pit digging and soil covering equipment for walnut planting is generally only responsible for digging pits when in use, soil covering still needs to be completed by manpower, and the process of fertilizing fruit trees in planting still needs to be done by manpower, so that the strength in the planting process is greatly increased.
Disclosure of Invention
The invention aims to provide a digging and fertilizing device for walnut planting aiming at the defects in the prior art so as to achieve the purpose of conveniently digging, covering and fertilizing the pit.
In order to achieve the purpose, the invention adopts the following technical scheme:
a pit digging and fertilizing device for walnut planting comprises a vehicle body, wherein a supporting plate is fixedly connected to one side of the vehicle body, a first electric telescopic rod is fixedly connected to the other side of the supporting plate, a connecting frame is fixedly connected to the bottom end of the first electric telescopic rod, a soil taking mechanism is installed at the bottom end of the connecting frame, a funnel is fixedly connected to the interior of the vehicle body, a discharging mechanism is installed at the bottom end of the funnel, wheels are fixedly connected to the bottom end of the vehicle body, a handle is fixedly connected to the other side of the vehicle body, a guy cable mechanism is installed at the top end of the handle, a sleeve is included in the soil taking mechanism, the sleeve is fixedly connected with the connecting frame, a motor is fixedly connected to the top end of the sleeve, first movable hinges are fixedly connected to two sides of the sleeve, a second electric telescopic rod is connected to the surface of the first movable hinges in a sleeved mode, and a, the bottom fixedly connected with of second activity hinge supports the horizontal pole, and supports one side fixedly connected with of horizontal pole and shovel, the opposite side fixedly connected with third activity hinge of support horizontal pole, and be fixed connection between third activity hinge and the sleeve, telescopic inside cup joints and is connected with auger stem, and auger stem passes and is fixed connection between sleeve and the motor.
As a further description of the above technical solution:
the supporting cross rod and the second electric telescopic rod form a movable structure through the second movable hinge, and the soil taking shovel and the third movable hinge form an opening and closing structure through the supporting cross rod.
As a further description of the above technical solution:
discharging mechanism's inside is including the discharge gate, and is fixed connection between discharge gate and the funnel, the cover groove has been seted up to the inside of discharge gate, and the inside of its cover groove cup joints and is connected with the bull stick, and the inside fixedly connected with baffle of bull stick, the spout has been seted up to the both sides of discharge gate, and the inside of spout cup joints and is connected with the slider, the outside of discharge gate cup joints and connects concave type slide, and is fixed connection between concave type slide and the slider, the top fixedly connected with L type shelves pole of concave type slide, and be connected for the laminating between L type shelves pole and the baffle.
As a further description of the above technical solution:
the baffle forms rotary structure through between bull stick and the cover groove, concave slide passes through to form sliding structure between slider and the spout. .
As a further description of the above technical solution:
the interior of the inhaul cable mechanism comprises a pressure plate, the front surface of the pressure plate is fixedly connected with a fourth movable hinge, the surface of the fourth movable hinge is connected with a support frame in a sleeved mode, the supporting frame is fixedly connected with the handle, the top end of the handle is fixedly connected with a first spring, and the top end of the first spring is fixedly connected with a fifth movable hinge which is fixedly connected with the pressure plate, and one side of the pressure plate is fixedly connected with a pull rope, the surface of the pull rope is connected with a pulley in an attaching way, the pulley is fixedly connected with the vehicle body, the other end of the pull rope is fixedly connected with a pull rod, the surface of the pull rod is sleeved and connected with a fixed block, the fixed block is fixedly connected with the discharge hole, and one side of the fixed block is jointed with a second spring, the second spring is connected with the pull rod in a sleeved mode, and the pull rod is fixedly connected with the concave sliding plate.
As a further description of the above technical solution:
the pressure plate and the support frame form a seesaw structure through the fourth movable hinge, and the pull rod and the fixed block form a sliding structure through the pull rope.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. according to the invention, under the action of the soil taking mechanism, the second electric telescopic rod is contracted by starting the second electric telescopic rod, the second movable hinge drives the supporting cross rod, the second supporting cross rod upwards orbits by taking the third movable hinge as a fulcrum, so that the soil taking shovel is opened, an external power supply of the motor is switched on to drive the auger stem to rotate, the first electric telescopic rod is started to enable the auger stem to descend for drilling, when the auger stem drills to a certain depth, the second electric telescopic rod is started again to enable the soil taking shovel to be closed, drilled soil can be taken away from a pit, the area of the pit can be enlarged, and after a tree is planted, the soil taking shovel is opened to scatter soil into the root of the tree.
2. According to the invention, under the action of the discharging mechanism, when the concave sliding plate is pulled, the concave sliding plate moves obliquely upwards along the direction of the sliding groove to drive the L-shaped stop lever to also move obliquely upwards, and when the L-shaped stop lever is contacted with the baffle, the baffle is pushed open, so that fertilizer is discharged through the discharging port, a manual fertilizing process is omitted, and hands are not injured in the fertilizing process.
3. According to the invention, under the action of the inhaul cable mechanism, the pressing plate is pressed, the pressing plate rotates by taking the fourth movable hinge as a fulcrum, the pressing plate rotates to stretch the first spring through the fifth movable hinge, so that the first spring stores elastic potential energy, the pressing plate rotates to pull the pull rope, the pull rope pulls the pull rod, the pull rod pulls the concave sliding plate, the discharge hole discharges fertilizer, the second spring contracts to store elastic potential energy, when the pressing plate is sent to be opened, parts are reset through the first spring and the second spring, and the fertilizer is released, so that the fertilizer application can be conveniently controlled, and the mechanism has automation.
Drawings
FIG. 1 is a schematic structural diagram of a digging and fertilizing device for walnut planting in the invention;
FIG. 2 is a schematic structural view of the soil-taking mechanism of the present invention;
FIG. 3 is a schematic structural view of a discharging mechanism according to the present invention;
FIG. 4 is a side view of the discharging mechanism of the present invention;
FIG. 5 is a schematic structural view of a cable mechanism according to the present invention;
FIG. 6 is an enlarged schematic structural view of a cable mechanism A of the present invention;
fig. 7 is an enlarged structural schematic diagram of a cable mechanism B in the invention.
Illustration of the drawings:
1. a vehicle body; 2. a support plate; 3. a first electric telescopic rod; 4. a connecting frame; 5. a soil taking mechanism; 501. a sleeve; 502. an electric motor; 503. a first living hinge; 504. a second electric telescopic rod; 505. a second living hinge; 506. a support rail; 507. taking a soil shovel; 508. a third living hinge; 509. a auger stem; 6. a funnel; 7. a wheel; 8. a discharging mechanism; 801. a discharge port; 802. sleeving a groove; 803. a rotating rod; 804. a baffle plate; 805. a chute; 806. a slider; 807. a concave slide plate; 808. an L-shaped shift lever; 9. a handle; 10. a cable mechanism; 1001. pressing a plate; 1002. a fourth living hinge; 1003. a support frame; 1004. a first spring; 1005. a fifth living hinge; 1006. pulling a rope; 1007. a pulley; 1008. a pull rod; 1009. a fixed block; 10010. a second spring.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-7, a pit digging and fertilizing device for walnut planting comprises a vehicle body 1, a supporting plate 2 is fixedly connected to one side of the vehicle body 1, a first electric telescopic rod 3 is fixedly connected to the other side of the supporting plate 2, a connecting frame 4 is fixedly connected to the bottom end of the first electric telescopic rod 3, a soil taking mechanism 5 is installed at the bottom end of the connecting frame 4, a funnel 6 is fixedly connected to the interior of the vehicle body 1, a discharging mechanism 8 is installed at the bottom end of the funnel 6, wheels 7 are fixedly connected to the bottom end of the vehicle body 1, a handle 9 is fixedly connected to the other side of the vehicle body 1, a guy cable mechanism 10 is installed at the top end of the handle 9, a sleeve 501 is included in the soil taking mechanism 5, the sleeve 501 is fixedly connected to the connecting frame 4, a motor 502 is fixedly connected to the top end of the sleeve 501, first movable hinges 503 are fixedly connected to two sides of the sleeve 501, and the bottom end fixedly connected with second activity hinge 505 of second electric telescopic handle 504, the bottom end fixedly connected with of second activity hinge 505 supports horizontal pole 506, and support one side fixedly connected with of horizontal pole 506 and borrow shovel 507, the opposite side fixedly connected with third activity hinge 508 of support horizontal pole 506, and be fixed connection between third activity hinge 508 and the sleeve 501, the inside bell and spigot joint of sleeve 501 is connected with auger stem 509, and auger stem 509 passes and is fixed connection between sleeve 501 and the motor 502, first electric telescopic handle 3 can let auger stem 509 descend the drilling hole.
Furthermore, the support cross bar 506 forms a movable structure with the second electric telescopic rod 504 through the second movable hinge 505, the soil taking blade 507 forms an opening and closing structure with the third movable hinge 508 through the support cross bar 506, the second electric telescopic rod 504 can close the soil taking blade 507, the drilled soil can be taken away from the pit, and the area of the pit can be enlarged.
Further, discharge mechanism 8's inside is including discharge gate 801, and be fixed connection between discharge gate 801 and funnel 6, trepanning 802 has been seted up to discharge gate 801's inside, the inside cup joint of its trepanning 802 is connected with bull stick 803, and the inside fixedly connected with baffle 804 of bull stick 803, spout 805 has been seted up to discharge gate 801's both sides, and the inside cup joint of spout 805 is connected with slider 806, the concave slide 807 of connection is cup jointed to discharge gate 801's outside, and be fixed connection between concave slide 807 and the slider 806, the top fixedly connected with L type shelves pole 808 of concave slide 807, and be connected for the laminating between L type shelves pole 808 and the baffle 804, can fix the motion trail of concave slide 807 through spout 805 and slider 806.
Furthermore, the baffle 804 forms a rotating structure between the rotating rod 803 and the sleeve groove 802, the concave sliding plate 807 forms a sliding structure between the sliding block 806 and the sliding groove 805, and the L-shaped baffle rod 808 can contact with the baffle 804 to push the baffle 804 open to release the fertilizer from the hopper 6.
Further, the interior of the cable mechanism 10 includes a pressing plate 1001, the front of the pressing plate 1001 is fixedly connected with a fourth movable hinge 1002, the surface of the fourth movable hinge 1002 is connected with a supporting frame 1003 in a sleeved manner, the supporting frame 1003 is fixedly connected with the handle 9, the top end of the handle 9 is fixedly connected with a first spring 1004, the top end of the first spring 1004 is fixedly connected with a fifth movable hinge 1005, the fifth movable hinge 1005 is fixedly connected with the pressing plate 1001, one side of the pressing plate 1001 is fixedly connected with a pulling rope 1006, the surface of the pulling rope 1006 is connected with a pulley 1007 in a fitted manner, the pulley 1007 is fixedly connected with the vehicle body 1, the other end of the pulling rope 1006 is fixedly connected with a pulling rod 1008, the surface of the pulling rod 1008 is connected with a fixing block 1009 in a sleeved manner, the fixing block 1009 is fixedly connected with the discharge port 801, one side of the fixing block 1009 is connected with a second spring 10010 in a fitted manner, the, and the pull rod 1008 and the concave sliding plate 807 are fixedly connected, the first spring 1004 and the second spring 10010 can store elastic potential energy, so that the components are reset.
Furthermore, a seesaw structure is formed between the pressing plate 1001 and the supporting frame 1003 through the fourth movable hinge 1002, a sliding structure is formed between the pull rod 1008 and the fixing block 1009 through the pull rope 1006, fertilization can be conveniently controlled through the structure, and therefore the device is automatic.
The working principle is as follows: when the device is used, the second electric telescopic rod 504 is started to contract the second electric telescopic rod 504, the second movable hinge 505 drives the support cross rod 506, the second support cross rod 506 moves upwards by taking the third movable hinge 508 as a fulcrum, so that the soil taking shovel 507 is opened, the external power supply of the motor 502 is switched on, the auger stem 509 is driven to rotate, the first electric telescopic rod 3 is started, the auger stem 509 descends to drill a hole, when the hole is drilled to a certain depth, the second electric telescopic rod 504 is started again to close the soil taking shovel 507, the drilled soil can be taken out of the hole, the area of the hole can be enlarged, after the tree is planted, the soil can be scattered into the root of the tree by only opening the soil taking shovel 507, when the concave sliding plate 807 is pulled, the concave sliding plate 807 moves obliquely upwards along the direction of the sliding groove 805, the L-shaped blocking rod 808 is driven to also move obliquely upwards, and when the L-shaped blocking rod 808 is in contact with the blocking plate 804, the baffle 804 is pushed open, so that fertilizer is discharged through the discharge port 801, a manual fertilizing process is omitted, the hand is not hurt in the fertilizing process, the pressing plate 1001 is pressed, the pressing plate 1001 rotates with the fourth movable hinge 1002 as a fulcrum, the pressing plate 1001 rotates to stretch the first spring 1004 through the fifth movable hinge 1005, so that the first spring 1004 stores elastic potential energy, the pressing plate 1001 rotates and also pulls the pull rope 1006, the pull rope 1006 pulls the pull rod 1008, the pull rod 1008 pulls the concave sliding plate 807, so that the discharge port 801 discharges the fertilizer, meanwhile, the second spring 10010 contracts to store the elastic potential energy, when the pressing plate 1001 is sent, the parts are reset through the first spring 1004 and the second spring 10010, the fertilizer is released, and the fertilizer application can be conveniently controlled through the structure, so that the working principle of the fertilizer applying device is completed.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims (6)

1. The utility model provides a walnut is planted with fertilization equipment that digs pit, including automobile body (1), its characterized in that: the soil taking device is characterized in that a supporting plate (2) is fixedly connected to one side of the vehicle body (1), a first electric telescopic rod (3) is fixedly connected to the other side of the supporting plate (2), a connecting frame (4) is fixedly connected to the bottom end of the first electric telescopic rod (3), a soil taking mechanism (5) is installed at the bottom end of the connecting frame (4), a funnel (6) is fixedly connected to the inside of the vehicle body (1), a discharging mechanism (8) is installed at the bottom end of the funnel (6), wheels (7) are fixedly connected to the bottom end of the vehicle body (1), a handle (9) is fixedly connected to the other side of the vehicle body (1), a cable mechanism (10) is installed at the top end of the handle (9), a sleeve (501) is arranged inside the soil taking mechanism (5), the sleeve (501) is fixedly connected with the connecting frame (4), and a motor (502) is fixedly connected to the, and the both sides fixedly connected with first activity hinge (503) of sleeve (501), the surface of first activity hinge (503) is cup jointed and is connected second electric telescopic handle (504), and the bottom fixedly connected with second activity hinge (505) of second electric telescopic handle (504), the bottom fixedly connected with of second activity hinge (505) supports horizontal pole (506), and supports one side fixedly connected with soil spade (507) of horizontal pole (506), the opposite side fixedly connected with third activity hinge (508) of support horizontal pole (506), and be fixed connection between third activity hinge (508) and sleeve (501), the inside of sleeve (501) is cup jointed and is connected with auger stem (509), and auger stem (509) passes and be fixed connection between sleeve (501) and motor (502).
2. The walnut planting is with fertilization equipment that digs pit of claim 1, characterized by: the supporting cross rod (506) and the second electric telescopic rod (504) form a movable structure through a second movable hinge (505), and the soil sampling shovel (507) and the third movable hinge (508) form an opening and closing structure through the supporting cross rod (506).
3. The walnut planting is with fertilization equipment that digs pit of claim 1, characterized by: discharge mechanism (8) inside including discharge gate (801), and be fixed connection between discharge gate (801) and funnel (6), cover groove (802) have been seted up to the inside of discharge gate (801), and the inside cup joint of its cover groove (802) is connected with bull stick (803), and the inside fixedly connected with baffle (804) of bull stick (803), spout (805) have been seted up to the both sides of discharge gate (801), and the inside cup joint of spout (805) is connected with slider (806), the outside of discharge gate (801) is cup jointed and is connected concave slide plate (807), and is fixed connection between concave slide plate (807) and slider (806), the top fixedly connected with L type shelves pole (808) of concave slide plate (807), and is connected for the laminating between L type shelves pole (808) and the baffle (804).
4. The walnut planting is with fertilization equipment that digs pit of claim 3, characterized by: the baffle (804) forms a rotating structure with the sleeve groove (802) through the rotating rod (803), and the concave sliding plate (807) forms a sliding structure with the sliding groove (805) through the sliding block (806).
5. The walnut planting is with fertilization equipment that digs pit of claim 1, characterized by: the interior of the stay cable mechanism (10) comprises a pressing plate (1001), a fourth movable hinge (1002) is fixedly connected to the front face of the pressing plate (1001), a supporting frame (1003) is connected to the surface of the fourth movable hinge (1002) in a sleeved mode, the supporting frame (1003) is fixedly connected with the handle (9), a first spring (1004) is fixedly connected to the top end of the handle (9), a fifth movable hinge (1005) is fixedly connected to the top end of the first spring (1004), the fifth movable hinge (1005) is fixedly connected with the pressing plate (1001), a stay rope (1006) is fixedly connected to one side of the pressing plate (1001), a pulley (1007) is connected to the surface of the stay rope (1006) in a fitted mode, the pulley (1007) is fixedly connected with the vehicle body (1), a pull rod (1008) is fixedly connected to the other end of the stay rope (1006), and a fixing block (1009) is connected to the surface of the pull rod (1008) in a sleeved mode, be fixed connection between fixed block (1009) and discharge gate (801), and one side laminating of fixed block (1009) is connected with second spring (10010), for cup jointing between second spring (10010) and pull rod (1008) be connected, and be fixed connection between pull rod (1008) and concave slide (807).
6. The walnut planting is with fertilization equipment that digs pit of claim 5, characterized by: the pressure plate (1001) and the support frame (1003) form a seesaw structure through the fourth movable hinge (1002), and the pull rod (1008) forms a sliding structure through the pull rope (1006) and the fixing block (1009).
CN202010056582.0A 2020-01-18 2020-01-18 Walnut is planted with fertilization equipment of digging pit Withdrawn CN111165122A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010056582.0A CN111165122A (en) 2020-01-18 2020-01-18 Walnut is planted with fertilization equipment of digging pit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010056582.0A CN111165122A (en) 2020-01-18 2020-01-18 Walnut is planted with fertilization equipment of digging pit

Publications (1)

Publication Number Publication Date
CN111165122A true CN111165122A (en) 2020-05-19

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CN202010056582.0A Withdrawn CN111165122A (en) 2020-01-18 2020-01-18 Walnut is planted with fertilization equipment of digging pit

Country Status (1)

Country Link
CN (1) CN111165122A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111758335A (en) * 2020-07-31 2020-10-13 熊雨杰 Agricultural seeder
CN113079776A (en) * 2021-04-06 2021-07-09 湖南东山云雾茶业有限公司 Trees fertilizer injection unit for afforestation
CN115413447A (en) * 2022-08-23 2022-12-02 芜湖市新城园林建设有限公司 Gardens are resumeed and are rebuild auxiliary device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111758335A (en) * 2020-07-31 2020-10-13 熊雨杰 Agricultural seeder
CN111758335B (en) * 2020-07-31 2021-09-24 汤永莉 Agricultural seeder
CN113079776A (en) * 2021-04-06 2021-07-09 湖南东山云雾茶业有限公司 Trees fertilizer injection unit for afforestation
CN115413447A (en) * 2022-08-23 2022-12-02 芜湖市新城园林建设有限公司 Gardens are resumeed and are rebuild auxiliary device
CN115413447B (en) * 2022-08-23 2023-12-15 芜湖市新城园林建设有限公司 Garden restoration and reconstruction auxiliary device

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Application publication date: 20200519