CN216752758U - Agricultural water-saving irrigation fertilizer injection unit - Google Patents
Agricultural water-saving irrigation fertilizer injection unit Download PDFInfo
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- CN216752758U CN216752758U CN202123343950.9U CN202123343950U CN216752758U CN 216752758 U CN216752758 U CN 216752758U CN 202123343950 U CN202123343950 U CN 202123343950U CN 216752758 U CN216752758 U CN 216752758U
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Abstract
The utility model relates to an irrigation and fertilization device, in particular to an agricultural water-saving irrigation and fertilization device. The utility model provides an agricultural water-saving irrigation and fertilization device which does not need flood irrigation, directly acts on plants of crops and has remarkable irrigation and fertilization effects. The utility model provides an agricultural water-saving irrigation and fertilization device, which comprises: the left side and the right side of the rear side of the bottom of the base are symmetrically provided with a fixed seat; the first rotating shaft is arranged between the lower parts of the side walls of the two fixing seats, which are far away from each other, in a penetrating manner; the gyro wheel all is provided with the gyro wheel about the first pivot, and base bottom front side middle part position is provided with the universal wheel. During operating personnel thrust unit moved the farmland, then operating personnel added water to first inlet pipe, added fertilizer to the second inlet pipe, and operating personnel rotates two sleeve pipes, then operating personnel slides two stopper pipes in opposite directions, and two stopper pipes enter into in the protective cover.
Description
Technical Field
The utility model relates to an irrigation and fertilization device, in particular to an agricultural water-saving irrigation and fertilization device.
Background
The water-saving irrigation can obtain the maximum yield or income with the minimum water consumption, namely, the irrigation measures can improve the crop yield and output value of unit irrigation water to the maximum extent.
The current farming needs to spray irrigation liquid fertilizer, promote the growth of trees, the instrument such as irrigation canals and ditches and water pump is used to the present irrigation mode carries out the flood irrigation fertilization to crops, but owing to at the in-process of flood irrigation fertilization, soil is drier, lead to a large amount of water and fertilizer not to be acted on the root stem leaf of crops by soil absorption, lead to not obvious to the fertilization effect of crops, and the residue of fertilizer leads to the soil hardening easily in the soil, influence crops later stage growth, consequently need provide one kind and need not the flood irrigation, can directly act on the plant of crops, the water conservation irrigation and fertilization device that the effect of fertigation is showing.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects that in the process of flood irrigation and fertilization, a large amount of water and fertilizer are absorbed by soil and do not act on roots, stems and leaves of crops due to the fact that the soil is dry, the fertilizing effect on the crops is not obvious, the soil is easy to harden due to the residue of the fertilizer in the soil, and the later growth of the crops is influenced, and the technical problems to be solved are as follows: the agricultural water-saving irrigation and fertilization device does not need flood irrigation, directly acts on plants of crops, and has remarkable irrigation and fertilization effects.
The technical scheme is as follows: an agricultural water-saving fertigation device, comprising: the left side and the right side of the rear side of the bottom of the base are symmetrically provided with a fixed seat; the first rotating shaft is arranged between the lower parts of the side walls of the two fixing seats, which are far away from each other, in a penetrating manner; the left end and the right end of the first rotating shaft are provided with the idler wheels, and the middle part of the front side of the bottom of the base is provided with the universal wheel; a groove is formed in the central position of the rear side of the top of the base, and a water storage tank is arranged in the groove in the central position of the rear side of the top of the base; the top of the water storage tank is provided with a protective cover; the middle part of the inner side wall of the protective cover is provided with a partition plate; the center of the upper part of the rear side wall of the protective cover is provided with a round hole, and the rear side of the round hole at the center of the upper part of the rear side wall of the protective cover is provided with a first feeding pipe; the center of the lower part of the rear side wall of the protective cover is provided with a round hole, and the rear side of the round hole in the center of the lower part of the rear side wall of the protective cover is provided with a second feeding pipe; the supporting block is arranged at the central position of the bottom of the inner wall of the water storage tank; the water pump is arranged at the top of the supporting block; the button is arranged at the position, close to the rear side, of the upper part of the right side wall of the water pump; the center of the top of the clapboard is provided with a round hole, the round hole at the center of the top of the clapboard is internally provided with a first guide pipe, and the bottom of the first guide pipe is connected with a water outlet pipe of the water pump; the top of the first conduit is provided with a flow divider; the lower parts of the left side and the right side of the outer wall of the protective cover are both provided with round holes, the round holes at the lower parts of the left side and the right side of the outer wall of the protective cover are both provided with a second conduit, and round holes are uniformly arranged at intervals at the sides of the bottoms of the two second conduits away from each other; the sleeve is arranged at one end, away from each other, of each of the two second guide pipes, round holes are uniformly formed in the sides, away from each other, of the bottoms of the two sleeves at intervals, and the uniformly-spaced round holes in the sides, away from each other, of the bottoms of the two sleeves are respectively matched with the uniformly-spaced round holes in the sides, away from each other, of the bottoms of the two second guide pipes; the plug pipes are arranged at the ends, close to each other, of the inner walls of the two second guide pipes in a sliding mode, material leaking grooves are formed in the tops of the ends, close to each other, of the two plug pipes and the lower portion of one side, far away from each other, of the two plug pipes, sliding grooves are formed in the front side walls of the ends, close to each other, of the two second guide pipes, and the two plug pipes are matched with the sliding grooves in the front side walls of the ends, close to each other, of the two second guide pipes in a sliding mode; the clamping block is arranged at the center of one side, away from each other, of each of the two plug pipes, and cross grooves are formed in the sides, away from each other, of the two clamping blocks; the clamping rods are arranged on the sides, close to each other, of the inner walls of the two sleeves, the front side and the rear side of one end, close to each other, of each of the two clamping rods are provided with convex blocks, and the convex blocks on the front side and the rear side of one end, close to each other, of each of the two clamping rods are respectively matched with the cross grooves on the sides, far away from each other, of the two clamping blocks; the top parts of the two second guide pipes are provided with support frames; the water outlet pipes are arranged in the middle positions of the left side and the right side of the outer wall of the flow divider, and the two water outlet pipe seals respectively penetrate through the upper parts of the two support frames; the bottom of the two water outlet pipes are evenly provided with the spray heads at intervals.
Further, still include: the right end of the first rotating shaft is provided with a first belt pulley; the base and the center of the upper part of the right side wall of the water storage tank are both provided with round holes, and a second rotating shaft is rotatably arranged between the base and the round holes in the center of the upper part of the right side wall of the water storage tank; the right end of the second rotating shaft is provided with a second belt pulley; the flat belt is wound between the first belt pulley and the second belt pulley; the shifting block is arranged on the rear wall of the rear side of the left end of the second rotating shaft and matched with the button.
Further, still include: the handle, the one end that two sleeve pipe outer wall rear sides kept away from each other all is provided with the handle.
Furthermore, the two plug pipes are made of rubber.
Further, the tops of the first feeding pipe and the second feeding pipe are both provided with covers.
Furthermore, the handle is sleeved with an anti-slip sleeve.
The utility model has the following advantages: 1. during operating personnel thrust unit removed the farmland, then operating personnel adds water to first inlet pipe, add fertilizer to the second inlet pipe, operating personnel rotates two sleeve pipes, then operating personnel with two stopper pipes in opposite directions slip, in two stopper pipes entered into the protective cover, fertilizer in the protective cover dropped and then fertilize crops through the even spaced round hole in one side that two sleeve pipe bottoms kept away from each other, operating personnel started the water pump, two outlet pipes irrigate crops from the shower nozzle blowout.
2. Operating personnel thrust unit, second pivot are rotated and are driven the shifting block and rotate, and the shifting block rotates extrusion button and then makes the water pump open and irrigate crops, and the second pivot rotates and drives the shifting block and rotate no longer extrusion button, and the water pump is closed and is opened and stop to irrigate crops.
3. An operator respectively holds the handles to rotate, the two handles respectively drive the two sleeves to rotate, and then the round holes uniformly spaced on one side, which are away from the bottom of the two sleeves each other, are respectively aligned with the round holes uniformly spaced on one side, which are away from the bottom of the two second guide pipes each other.
Drawings
Fig. 1 is a schematic perspective view of the present invention.
FIG. 2 is a schematic cross-sectional view of a first partial body according to the present invention.
FIG. 3 is a schematic cross-sectional view of a second partial body according to the present invention.
Fig. 4 is a schematic exploded perspective view of the present invention.
Fig. 5 is a third partial perspective sectional structural view of the present invention.
Reference numerals: 1_ base, 2_ fixing base, 3_ first rotating shaft, 4_ roller, 5_ water storage tank, 51_ protective cover, 6_ clapboard, 7_ first feeding pipe, 8_ second feeding pipe, 9_ supporting block, 10_ water pump, 101_ button, 11_ first guide pipe, 12_ diverter, 13_ second guide pipe, 14_ sleeve pipe, 15_ stopper pipe, 16_ fixture block, 17_ fixture rod, 18_ supporting frame, 19_ water outlet pipe, 20_ spray head, 21_ first belt pulley, 22_ second rotating shaft, 23_ second belt pulley, 24_ flat belt, 25_ dial block and 26_ handle.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.
Example 1
An agricultural water-saving irrigation and fertilization device is shown in figures 1-5 and comprises a base 1, a fixed seat 2, a first rotating shaft 3, rollers 4, a water storage tank 5, a protective cover 51, a partition plate 6, a first feeding pipe 7, a second feeding pipe 8, a supporting block 9, a water pump 10, a button 101, a first guide pipe 11, a flow divider 12, a second guide pipe 13, a sleeve 14, a plug pipe 15, a clamping block 16, a clamping rod 17, a supporting frame 18, a water outlet pipe 19 and a spray head 20, wherein the fixed seats 2 are symmetrically arranged on the left side and the right side of the rear side of the bottom of the base 1, the first rotating shaft 3 is arranged between the lower parts of one side wall, which are far away from each other, of the two fixed seats 2 in a penetrating manner, the rollers 4 are arranged at the left end and the right end of the first rotating shaft 3, universal wheels are arranged at the middle position of the front side of the bottom of the base 1, grooves are formed at the center position of the rear side of the top of the base 1, the water storage tank 5 is arranged in the grooves at the center position of the rear side of the top of the base 1, the top of the water storage tank 5 is provided with a protective cover 51, the middle part of the inner side wall of the protective cover 51 is provided with a partition plate 6 in a welding mode, the central position of the upper part of the rear side wall of the protective cover 51 is provided with a round hole, the rear side of the round hole at the central position of the upper part of the rear side wall of the protective cover 51 is provided with a first feed pipe 7, the central position of the lower part of the rear side wall of the protective cover 51 is provided with a round hole, the rear side of the round hole at the central position of the lower part of the rear side wall of the protective cover 51 is provided with a second feed pipe 8, the tops of the first feed pipe 7 and the second feed pipe 8 are prevented when the device moves, water and fertilizer are spilled from the first feed pipe 7 and the second feed pipe 8, the central position of the bottom of the inner wall of the water storage tank 5 is provided with a supporting block 9, the top of the supporting block 9 is provided with a water pump 10 in a bolt connection mode, the upper part of the right side wall of the water pump 10 is provided with a button 101 at the central position near the top of the partition plate 6, the round hole is provided with a round hole, a first guide pipe 11, the bottom of the first guide pipe 11 is connected with a water outlet pipe 19 of a water pump 10, the top of the first guide pipe 11 is provided with a flow divider 12, the lower parts of the left side and the right side of the outer wall of a protective cover 51 are provided with round holes, the round holes of the lower parts of the left side and the right side of the outer wall of the protective cover 51 are provided with second guide pipes 13, the sides of the bottoms of the two second guide pipes 13, which are far away from each other, are uniformly spaced with round holes, one ends of the bottoms of the two sleeve pipes 14, which are far away from each other, are provided with sleeve pipes 14, one sides of the bottoms of the two sleeve pipes 14, which are far away from each other, are uniformly spaced with round holes respectively matched with the sides of the bottoms of the two second guide pipes 13, the ends of the inner walls of the two second guide pipes 13, which are close to each other, are provided with plug pipes 15 in a sliding manner, the two plug pipes 15 are made of rubber materials, the rubber materials have good sealing performance, after the two plug pipes 15 are separated from the protective cover 51, the fertilizer in the protective cover 51 can be prevented from flowing out, the top of one end of each of the two plug pipes 15 close to each other and the lower part of one side far away from each other are provided with material leaking grooves, the front side wall of one end of each of the two second guide pipes 13 close to each other is provided with sliding grooves, the two plug pipes 15 are respectively matched with the sliding grooves of the front side wall of one end of each of the two second guide pipes 13 close to each other in a sliding manner, the central position of one side far away from each other of the two plug pipes 15 is provided with a clamping block 16, the side far away from each other of the two clamping blocks 16 is provided with cross grooves, the side near each of the inner walls of the two sleeves 14 is provided with a clamping rod 17, the front side and the rear side of one end close to each of the two clamping rods 17 are provided with convex blocks, the front side and the rear side of one end close to each other of the two clamping rods 17 are respectively matched with the cross grooves of one side far away from each other of the two clamping blocks 16, the top of each of the two second guide pipes 13 is provided with a support frame 18, the middle positions of the left side and the left side of the outer wall of the diverter 12 are provided with water outlet pipes 19, two water outlet pipes 19 are sealed and respectively penetrate through the upper parts of the two support frames 18, and spray heads 20 are uniformly arranged at the bottoms of the two water outlet pipes 19 at intervals.
When crops need to be irrigated, the two rollers 4 and the universal wheel at the middle position of the front side of the bottom of the base 1 roll on the ground by the pushing device of the operator, so that the device moves into a farmland, then the operator adds water into the first feeding pipe 7, the water enters between the water storage tank 5 and the protective cover 51 through the first feeding pipe 7, then the operator adds fertilizer into the second feeding pipe 8, the fertilizer enters into the protective cover 51 through the second feeding pipe 8 and falls into the top of the partition plate 6, then the operator rotates the two sleeves 14, so that the uniformly spaced circular holes at the sides far away from each other at the bottoms of the two sleeves 14 are respectively aligned with the uniformly spaced circular holes at the sides far away from each other at the bottoms of the two second guide pipes 13, the two sleeves 14 respectively drive the two clamping rods 17 to rotate, and then the convex blocks at the front side and the back side of the end, close to each other, of the two clamping rods 17 are respectively separated from the cross grooves at the sides, far away from each clamping block 16, then an operator slides the two plug pipes 15 in opposite directions, so that the two plug pipes 15 enter the protective cover 51, fertilizer in the protective cover 51 flows into the two second feed pipes 8 through the material leaking grooves at the top of one end of the two plug pipes 15 close to each other and at the lower part of one side far away from each other, the fertilizer in the two second feed pipes 8 falls through the round holes at the uniform intervals at one side far away from each other at the bottom of the two sleeves 14, so as to fertilize crops, when the crops need to be irrigated, the operator starts the water pump 10, the water between the water storage tank 5 and the protective cover 51 is pressurized and fed into the first guide pipe 11 by the water pump 10, the water in the first guide pipe 11 is pressurized and flows into the flow divider 12, the water in the flow divider 12 is sprayed out of the spray head 20 through the two water outlet pipes 19 to irrigate the crops, the operator pushing device enables the two rollers 4 and the universal wheel at the middle position of the front side at the bottom of the base 1 to roll on the ground, and then make the device remove in the farmland and carry out abundant irrigation to crops, irrigate the completion back, operating personnel closes water pump 10, make water no longer spout from shower nozzle 20 through two outlet pipes 19, then operating personnel slides two stopper pipes 15 dorsad, two stopper pipes 15 break away from in the protective cover 51, and then make the fertilizer in two second inlet pipes 8 no longer drop through the even spaced round hole in one side that two sleeve pipes 14 bottoms kept away from each other, two stopper pipes 15 drive two fixture blocks 16 respectively and cooperate again with the lug of both sides around the one end that two kellies 17 are close to each other again, two sleeve pipes 14 of operating personnel antiport reset afterwards. The device does not need flood irrigation, can be directly applied to plants of crops, and has remarkable irrigation and fertilization effects.
Example 2
On the basis of embodiment 1, referring to fig. 5, the water storage tank further includes a first belt pulley 21, a second rotating shaft 22, a second belt pulley 23, a flat belt 24 and a shifting block 25, the right end of the first rotating shaft 3 is provided with the first belt pulley 21 in a key connection manner, round holes are formed in the center positions of the upper portions of the right side walls of the base 1 and the water storage tank 5, the second rotating shaft 22 is rotatably arranged between the round holes in the center positions of the upper portions of the right side walls of the base 1 and the water storage tank 5, the second belt pulley 23 is arranged at the right end of the second rotating shaft 22, the flat belt 24 is wound between the first belt pulley 21 and the second belt pulley 23, the shifting block 25 is arranged on the rear wall of the rear side of the left end of the second rotating shaft 22, and the shifting block 25 is matched with the button 101.
Operating personnel thrust unit makes two gyro wheels 4 and 1 bottom front side middle part position of base be provided with the universal wheel and rolls subaerial, two gyro wheels 4 rotate and drive first pivot 3, first pivot 3 rotates and drives first belt pulley 21 and rotate, first belt pulley 21 drives second belt pulley 23 through flat belt 24 and rotates, second belt pulley 23 drives second pivot 22 and rotates, second pivot 22 rotates and drives shifting block 25 and rotate, shifting block 25 rotates extrusion button 101 and then makes water pump 10 open and irrigate crops, second pivot 22 rotates and drives shifting block 25 and no longer extrude button 101, and then make water pump 10 close and open and stop to irrigate crops.
Referring to fig. 3, the sheath type medical nursing bed further comprises handles 26, the handles 26 are arranged at the ends far away from each other at the rear sides of the outer walls of the two sleeves 14, and anti-slip sleeves are sleeved on the handles 26 to prevent the hands from slipping due to sweat when an operator holds the handles 26 tightly.
An operator respectively holds the handles 26 to rotate, the two handles 26 respectively drive the two sleeves 14 to rotate, and then the round holes uniformly spaced on one side, away from each other, at the bottoms of the two sleeves 14 are respectively aligned with the round holes uniformly spaced on one side, away from each other, at the bottoms of the two second guide pipes 13.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The utility model provides an agricultural water conservation fertigation device which characterized in that includes:
the device comprises a base (1), wherein fixing seats (2) are symmetrically arranged on the left side and the right side of the rear side of the bottom of the base (1);
the first rotating shaft (3) is arranged between the lower parts of the side walls of the two fixed seats (2) which are far away from each other in a penetrating manner;
the left end and the right end of the first rotating shaft (3) are provided with the idler wheels (4), and the middle position of the front side of the bottom of the base (1) is provided with universal wheels;
a water storage tank (5), wherein a groove is formed in the center of the rear side of the top of the base (1), and the water storage tank (5) is arranged in the groove in the center of the rear side of the top of the base (1);
the top of the water storage tank (5) is provided with a protective cover (51);
the middle part of the inner side wall of the protective cover (51) is provided with a clapboard (6);
the center of the upper part of the rear side wall of the protective cover (51) is provided with a round hole, and the rear side of the round hole at the center of the upper part of the rear side wall of the protective cover (51) is provided with the first feeding pipe (7);
a round hole is formed in the center of the lower portion of the rear side wall of the protective cover (51), and the second feeding pipe (8) is arranged on the rear side of the round hole in the center of the lower portion of the rear side wall of the protective cover (51);
the supporting block (9) is arranged at the central position of the bottom of the inner wall of the water storage tank (5);
the water pump (10) is arranged at the top of the supporting block (9);
the button (101) is arranged at the position, close to the rear side, of the upper part of the right side wall of the water pump (10);
the water pump comprises a first guide pipe (11), a round hole is formed in the center of the top of a partition plate (6), the first guide pipe (11) is arranged in the round hole in the center of the top of the partition plate (6), and the bottom of the first guide pipe (11) is connected with a water outlet pipe (19) of a water pump (10);
the top of the first conduit (11) is provided with a flow divider (12);
round holes are formed in the lower portions of the left side and the right side of the outer wall of the protective cover (51) respectively, the second guide pipes (13) are arranged in the round holes in the lower portions of the left side and the right side of the outer wall of the protective cover (51), and round holes are formed in the sides, away from each other, of the bottoms of the two second guide pipes (13) at equal intervals;
the end, far away from each other, of each of the two second guide pipes (13) is provided with a sleeve (14), round holes are uniformly formed in the side, far away from each other, of the bottom of each of the two sleeves (14) at intervals, and the round holes uniformly formed in the side, far away from each other, of the bottom of each of the two sleeves (14) are matched with the round holes uniformly formed in the side, far away from each other, of the bottom of each of the two second guide pipes (13);
the plug pipes (15) are arranged at the ends, close to each other, of the inner walls of the two second guide pipes (13) in a sliding mode, the top parts of the ends, close to each other, of the two plug pipes (15) and the lower parts of the sides, far away from each other, of the two plug pipes (15) are provided with material leaking grooves, the front side walls, close to each other, of the ends of the two second guide pipes (13) are provided with sliding grooves, and the two plug pipes (15) are matched with the sliding grooves of the front side walls, close to each other, of the ends of the two second guide pipes (13) in a sliding mode; the center of one side, away from each other, of each of the two plug pipes (15) is provided with a clamping block (16), and one side, away from each other, of each of the two clamping blocks (16) is provided with a cross groove;
the clamping rods (17) are arranged on the sides, close to each other, of the inner walls of the two sleeves (14), the front side and the rear side of one end, close to each other, of each clamping rod (17) are provided with convex blocks, and the convex blocks on the front side and the rear side of one end, close to each other, of each clamping rod (17) are respectively matched with the cross grooves on the sides, far away from each other, of the two clamping blocks (16);
the top parts of the two second guide pipes (13) are respectively provided with a support frame (18);
the water outlet pipes (19) are arranged in the middle positions of the left side and the right side of the outer wall of the flow divider (12), and the two water outlet pipes (19) seal and respectively penetrate through the upper parts of the two support frames (18);
the bottom parts of the two water outlet pipes (19) are evenly provided with the spray heads (20) at intervals.
2. The agricultural water-saving fertigation device according to claim 1, further comprising: the right end of the first rotating shaft (3) is provided with a first belt pulley (21); round holes are formed in the center positions of the upper portions of the right side walls of the base (1) and the water storage tank (5), and the second rotating shaft (22) is rotatably arranged between the round holes in the center positions of the upper portions of the right side walls of the base (1) and the water storage tank (5); the right end of the second rotating shaft (22) is provided with a second belt pulley (23); a flat belt (24), wherein the flat belt (24) is wound between the first belt pulley (21) and the second belt pulley (23); the rear wall of the rear side of the left end of the second rotating shaft (22) is provided with a shifting block (25), and the shifting block (25) is matched with the button (101).
3. The agricultural water-saving fertigation device of claim 1, further comprising: handles (26) are arranged at the rear sides of the outer walls of the two sleeves (14) at the ends far away from each other.
4. The agricultural water-saving fertigation device according to claim 1, wherein the two plug pipes (15) are made of rubber.
5. The agricultural water-saving fertigation device according to claim 1, wherein the top of the first feeding pipe (7) and the top of the second feeding pipe (8) are provided with covers.
6. The agricultural water-saving irrigation and fertilization device as claimed in claim 3, wherein the handle (26) is sleeved with an anti-slip sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123343950.9U CN216752758U (en) | 2021-12-28 | 2021-12-28 | Agricultural water-saving irrigation fertilizer injection unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123343950.9U CN216752758U (en) | 2021-12-28 | 2021-12-28 | Agricultural water-saving irrigation fertilizer injection unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216752758U true CN216752758U (en) | 2022-06-17 |
Family
ID=81971456
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123343950.9U Active CN216752758U (en) | 2021-12-28 | 2021-12-28 | Agricultural water-saving irrigation fertilizer injection unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216752758U (en) |
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2021
- 2021-12-28 CN CN202123343950.9U patent/CN216752758U/en active Active
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