CN113229114A - Drip irrigation device for desert highway protection forest - Google Patents
Drip irrigation device for desert highway protection forest Download PDFInfo
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- CN113229114A CN113229114A CN202110631473.1A CN202110631473A CN113229114A CN 113229114 A CN113229114 A CN 113229114A CN 202110631473 A CN202110631473 A CN 202110631473A CN 113229114 A CN113229114 A CN 113229114A
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- Prior art keywords
- drip irrigation
- rod
- supporting
- positioning sleeve
- irrigation device
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G25/00—Watering gardens, fields, sports grounds or the like
- A01G25/02—Watering arrangements located above the soil which make use of perforated pipe-lines or pipe-lines with dispensing fittings, e.g. for drip irrigation
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G25/00—Watering gardens, fields, sports grounds or the like
- A01G25/16—Control of watering
- A01G25/167—Control by humidity of the soil itself or of devices simulating soil or of the atmosphere; Soil humidity sensors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/22—Improving land use; Improving water use or availability; Controlling erosion
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- Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Engineering & Computer Science (AREA)
- Water Supply & Treatment (AREA)
- Environmental Sciences (AREA)
- Buildings Adapted To Withstand Abnormal External Influences (AREA)
Abstract
The invention provides a drip irrigation device for a desert highway shelter forest, which belongs to the technical field of shelter forest irrigation and comprises a supporting part, a detection part, a drip irrigation part, a supporting part and a pressure repelling part. In the embodiment of the invention, the detection part is used for detecting the water content of the ground soil, and when the ground soil has larger water content, the repulsion part drives the jacking part to move so as to reduce the drip irrigation speed of the drip irrigation part and realize the interception of the drip irrigation part, thereby saving the water consumption; when the ground soil moisture content is smaller, the pressure repellent portion drives the supporting portion to move reversely so as to increase the drip irrigation speed of the drip irrigation portion and achieve drip irrigation operation of plants.
Description
Technical Field
The invention belongs to the technical field of irrigation of protection forests, and particularly relates to a drip irrigation device for a protection forest on a desert highway.
Background
At present, the irrigation of desert highway protection forests mostly needs additional power for pressure irrigation. The power of the irrigation system generally needs to be provided by electric power, and meanwhile, a pump room and a corresponding pipe network system are needed. The supporting facilities are more, the investment is larger, and the operation and maintenance cost is higher. Simultaneously because the evaporation capacity is great in the desert area, the water source is comparatively in short supply, and current conventional device of driping irrigation can not control the speed of driping irrigation according to the condition of soil moisture content, when root zone soil moisture content is great, driping irrigation still goes on with the constant speed, so, must have the problem of water waste.
Disclosure of Invention
In order to overcome the defects in the prior art, the embodiment of the invention provides a drip irrigation device for a desert road shelter forest.
In order to solve the technical problems, the invention provides the following technical scheme:
a drip irrigation device for desert highway shelter forests comprises a supporting part, a detecting part, a drip irrigation part, a supporting part and a pressure repelling part;
the detection part is arranged on one side of the supporting part and is used for being inserted into soil so as to detect the water content of the soil;
the drip irrigation part is arranged on one side of the supporting part and is used for outputting a water source to carry out drip irrigation on the plants;
the supporting part is arranged on one side of the drip irrigation part and is used for adjusting the drip irrigation flow of the drip irrigation part;
the repulsion part is arranged on one side of the jacking part and is used for providing repulsion force for the jacking part;
when the water content in the soil is larger than a set value, the repulsive force output by the pressure repelling part is enhanced, the supporting part is driven to move to increase the interception effect of the drip irrigation part, and the drip irrigation speed of the drip irrigation part is reduced;
when the water content in the soil is smaller than a set value, the repulsive force output by the pressure repelling part is weakened, the supporting part is driven to move reversely to reduce the flow stopping effect of the drip irrigation part, and the drip irrigation speed of the drip irrigation part is improved.
As a further improvement of the invention: the water absorbing part penetrates through the electric conductor and is connected with one end of the coil;
the output end of the power supply part is connected with the conductor through a wire, and the input end of the power supply part is connected with the other end of the coil through a wire;
the jacking portion comprises a permanent magnet arranged opposite to the electromagnet, a jacking rod arranged on one side of the permanent magnet, which is far away from the electromagnet, and a reset portion used for driving the jacking rod to move towards the electromagnet, and the magnetic poles of the electromagnet on the side opposite to the permanent magnet are the same;
one end, far away from the permanent magnet, of the top supporting rod is used for intercepting the drip irrigation part so as to intercept the drip irrigation part.
As a further improvement of the invention: the detection part comprises an inserted rod, a conductor, a water absorbing piece and a power supply part,
the electric conductor is fixedly arranged at one end of the inserted link, the water absorbing piece is arranged inside the inserted link and used for absorbing water in ground soil, one end of the water absorbing piece penetrates through the electric conductor and is attached to the electric conductor, and the water absorbing piece is electrically connected with the pressing part;
the power supply part is arranged on one side of the supporting part and is used for controlling the electric conduction of the electric conductor and the pressure repelling part.
As a further improvement of the invention: the drip irrigation part comprises a liquid storage tank and a dropper arranged on one side of the liquid storage tank, a flexible body is arranged on the dropper, and one end, far away from the permanent magnet, of the top support rod acts on the flexible body.
As a further improvement of the invention: the supporting part comprises a support, wherein a first guide part is arranged on one side of the support and used for guiding and supporting the movement of the inserted bar, and the stable movement of the inserted bar is guaranteed.
As a further improvement of the invention: the first guide part comprises a first connecting rod fixedly arranged on one side of the support and a first positioning sleeve fixedly arranged on one end of the support, and the first connecting rod is far away from the first positioning sleeve at one end of the support, and the insertion rod penetrates through the first positioning sleeve and is movably matched with the first positioning sleeve.
As a still further improvement of the invention: the first positioning sleeve is in threaded fit with the inserted rod.
As a still further improvement of the invention: the side wall of the liquid storage tank is provided with a second guide part, and the second guide part is used for providing guide support for the movement of the top support rod and ensuring the stable movement of the top support rod.
As a still further improvement of the invention: the second guide part comprises a second positioning sleeve, the second positioning sleeve is fixedly connected with the side wall of the liquid storage tank, and the top support rod penetrates through the second positioning sleeve and is movably matched with the second positioning sleeve.
As a still further improvement of the invention: the reset part comprises a stop block fixedly arranged on the side wall of the top support rod, the stop block is connected with the second positioning sleeve through an elastic body, and the elastic body provides elastic support for the top support rod so as to ensure that the distance between the electromagnet and the permanent magnet is unchanged.
Compared with the prior art, the invention has the beneficial effects that:
in the embodiment of the invention, the detection part is used for detecting the water content of the ground soil, and when the ground soil has larger water content, the repulsion part drives the jacking part to move so as to reduce the drip irrigation speed of the drip irrigation part and realize the interception of the drip irrigation part, thereby saving the water consumption; when the ground soil moisture content is smaller, the pressure repellent portion drives the supporting portion to move reversely so as to increase the drip irrigation speed of the drip irrigation portion and achieve drip irrigation operation of plants.
Drawings
FIG. 1 is a schematic structural view of a drip irrigation device for a desert highway shelter forest;
FIG. 2 is a first schematic structural diagram of a detection part in the drip filling of the desert highway shelter forest;
FIG. 3 is a schematic structural diagram II of a detection part in the desert highway shelter forest drip filling device;
FIG. 4 is an enlarged view of area A of FIG. 1;
in the figure: 1-supporting part, 11-truckle, 12-bracket, 13-first positioning sleeve, 14-first connecting rod, 2-detecting part, 21-inserted rod, 22-electric conductor, 23-water absorbing part, 3-drip irrigation part, 31-liquid storage tank, 32-second connecting rod, 33-drip tube, 34-flexible body, 4-supporting part, 41-permanent magnet, 42-top supporting rod, 43-second positioning sleeve, 44-elastic body, 45-baffle block, 5-pressure repelling part, 51-coil, 52-electromagnet and 6-power supply part.
Detailed Description
The technical solution of the present patent will be described in further detail with reference to the following embodiments.
Reference will now be made in detail to embodiments of the present patent, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present patent and are not to be construed as limiting the present patent.
In the description of this patent, it is to be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for the convenience of describing the patent and for the simplicity of description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the patent.
In the description of this patent, it is noted that unless otherwise specifically stated or limited, the terms "mounted," "connected," and "disposed" are to be construed broadly and can include, for example, fixedly connected, disposed, detachably connected, disposed, or integrally connected and disposed. The specific meaning of the above terms in this patent may be understood by those of ordinary skill in the art as appropriate.
Referring to fig. 1, the present embodiment provides a drip irrigation device for desert road shelter forest, which includes a supporting portion 1, a detecting portion 2, a drip irrigation portion 3, a supporting portion 4 and a pressure-repelling portion 5; the detection part 2 is arranged on one side of the support part 1 and is used for being inserted into soil to detect the water content condition of the soil; the drip irrigation part 3 is arranged on one side of the support part 1 and is used for outputting a water source to carry out drip irrigation on the plants; the supporting part 4 is arranged on one side of the drip irrigation part 3 and is used for adjusting the drip irrigation flow of the drip irrigation part 3; the repulsion portion 5 is arranged on one side of the supporting portion 4 and used for providing repulsion force for the supporting portion 4, when the water content in the soil is larger than a set value, the repulsion force output by the repulsion portion 5 is enhanced, the supporting portion 4 is driven to move so as to increase the interception effect of the drip irrigation portion 3, and the drip irrigation speed of the drip irrigation portion 3 is reduced; when the water content in the soil is smaller than a set value, the repulsive force output by the pressure repelling part 5 is weakened, the supporting part 4 is driven to move reversely to reduce the interception effect of the drip irrigation part 3, and the drip irrigation speed of the drip irrigation part 3 is improved.
The detection part 2 is inserted into the soil to detect the soil moisture content, and when the soil moisture content is greater than a set value, the pressure repelling part 5 drives the supporting part 4 to move so as to reduce the drip irrigation speed of the drip irrigation part 3 and realize the interception of the drip irrigation part 3; when the soil moisture content is less than the set value, repel the splenium 5 and drive the 4 reverse movements of top supporting portion to improve the speed of driping irrigation portion 3, realize the driping irrigation of plant.
Referring to fig. 1 to 3, in an embodiment, the detecting portion 2 includes an inserting rod 21, a conductive body 22, a water absorbing member 23 and a power supply portion 6, the conductive body 22 is fixedly disposed at one end of the inserting rod 21, the water absorbing member 23 is disposed inside the inserting rod 21 and is used for absorbing water in ground soil, one end of the water absorbing member 23 penetrates through the conductive body 22 and is attached to the conductive body 22, and the water absorbing member 23 is electrically connected to the pressing portion 5; the power supply part 6 is installed at one side of the support part 1 and controls the electrical conduction between the conductor 22 and the voltage repulsion part 5.
When in use, one end of the inserted link 21 is inserted into the ground soil, and the water in the soil can be absorbed by the water absorbing piece 23; when the water content in the soil is greater than a set value, the water absorbing part 23 absorbs water, at the moment, the current output by the power supply part 6 is transmitted to the water absorbing part 23 through the electric conductor 23 and then transmitted to the pressure repelling part 5 through the water absorbing part 23, and the pressure repelling part 5 generates repulsive force after being electrified so as to drive the supporting part 4 to move and carry out intercepting control on the drip irrigation part 3; when the water content in the soil is less than the set value, the water absorbing piece is in a micro-wet state or a dry state, the current carried by the pressing part 5 is small or no current, the repulsive force of the pressing part 5 is small or no repulsive force, the action effect of the supporting part 4 and the drip irrigation part 3 is small or no action effect, namely the drip irrigation speed of the drip irrigation part 3 is high, and the drip irrigation operation of plants is realized.
In another embodiment, the detecting portion 2 may also be a sensor (not shown) for detecting the moisture content of the soil and a controller (not shown) electrically connected to the sensor, the controller controls the electrical conduction between the conductive body 22 and the pressure-repelling portion 5, and the sensor directly detects the moisture content of the soil to control the drip irrigation.
Referring to fig. 1 and 4, in an embodiment, the pressure-repelling portion 5 includes an electromagnet 52 fixedly installed inside the supporting portion 1 and a coil 51 wound on the electromagnet 52, and the water absorbing member 23 penetrates through the conductor 22 and is connected to one end of the coil 51; the output end of the power supply part 6 is connected with the conductor 22 through a lead, and the input end of the power supply part 6 is connected with the other end of the coil 51 through a lead; the top supporting part 4 comprises a permanent magnet 41 arranged opposite to the electromagnet 52, a top stay 42 arranged on one side of the permanent magnet 41 far away from the electromagnet 52 and a resetting part for driving the top stay 42 to move towards the electromagnet 52, the magnetic poles of the electromagnet 52 on the side opposite to the permanent magnet 41 are the same, and one end of the top stay 42 far away from the permanent magnet 41 is used for intercepting the drip irrigation part 3 so as to intercept the drip irrigation part 3; the drip irrigation part 3 includes a liquid storage tank 31 and a dropper 33 provided on one side of the liquid storage tank 31, the dropper 33 has a flexible body 34, and one end of the top stay 42 away from the permanent magnet 41 acts on the flexible body 34.
When the water content in the soil is greater than a set value, the water absorption amount of the water absorption piece 23 is large, at the moment, the water absorption piece 23 is attached to the electric conductor 22, the water absorption piece 23 and the coil 51 realize a current loop, the electromagnet 52 is electrified, and then repulsive force is generated on the permanent magnet 41 to drive the permanent magnet 41 and the top stay bar 42 to move in the direction away from the electromagnet 52, the flexible body 34 is extruded by the top stay bar 42, and the flow rate of the dropper 33 is reduced; when the water content in the soil is smaller than the set value, the water absorbing amount of the water absorbing member 23 is small, the current flowing through the coil 51 is small or no current, the repulsive force generated by the electromagnet 52 is small or no repulsive force, and the reset portion drives the top stay 42 and the permanent magnet 41 to move in the opposite direction to the electromagnet 52, so that the top supporting effect on the flexible body 34 is reduced or released, and the dropping speed of the dropper 33 is increased.
In another embodiment, the top supporting rod 42 can be driven to move by a driving structure such as a linear motor or a hydraulic push rod, so as to squeeze the flexible body 33, thereby controlling the flow rate of the dropper 33.
In another embodiment, the drip irrigation part 3 comprises a liquid storage tank 31 and a dropper 33 arranged on one side of the liquid storage tank 31, and one end of the top stay 42 far away from the permanent magnet 41 can close the tail end of the dropper 33, so that the movement of the top stay 42 is utilized to change the size of the seal of the tail end of the dropper 33, thereby realizing the adjustment of the dropping speed.
Referring to fig. 1, in one embodiment, the supporting portion 1 includes a bracket 12 and a caster 11 installed at the bottom of the bracket 12, a first guiding portion is disposed at one side of the bracket 12, the first guiding portion is used for providing guiding support for the movement of the inserting rod 21, ensuring smooth movement of the inserting rod,
the first guide part comprises a first connecting rod 14 fixedly arranged on one side of the support 12 and a first positioning sleeve 13 fixedly arranged on one end, far away from the support 12, of the first connecting rod 14, and the inserting rod 21 penetrates through the first positioning sleeve 13 and is movably matched with the first positioning sleeve 13.
Support is provided for inserted bar 21 through first location sleeve 13 to inside removal and the inserting ground soil that first location sleeve 13 can be smooth, realize the detection of soil moisture content.
In another embodiment, the first positioning sleeve 13 and the insertion rod 21 are engaged with each other by screw threads, and in use, the insertion rod 21 is rotated such that the insertion rod 21 is screwed downward compared with the first positioning sleeve 13, and the bottom of the insertion rod 21 is inserted into the ground.
Referring to fig. 1, in one embodiment, the liquid storage tank 31 is fixedly connected to the sidewall of the bracket 12 through a second connecting rod 32.
With reference to fig. 1, in one embodiment, the side wall of the liquid storage tank 31 is provided with a second guiding portion, and the second guiding portion is used for providing guiding support for the movement of the top brace 42, so as to ensure the smooth movement of the top brace 42.
The second guiding part comprises a second positioning sleeve 43, the second positioning sleeve 43 is fixedly connected with the side wall of the liquid storage tank 31, and the top supporting rod 42 penetrates through the second positioning sleeve 43 and is movably matched with the second positioning sleeve 43.
The top stay 42 is supported by the second positioning sleeve 43 to ensure smooth movement of the top stay 42.
With reference to fig. 1, in an embodiment, the resetting portion includes a stopper 45 fixedly disposed on a side wall of the top brace 42, the stopper 45 is connected to the second positioning sleeve 43 through an elastic body 44, and the elastic body 44 provides an elastic support for the top brace 42, so that when the magnetism of the electromagnet 52 is weakened, the elastic body 44 realizes a reverse movement of the top brace 42, thereby increasing the drip irrigation speed.
In the above embodiment, the water absorbing member 23 is a water absorbing hemp rope or a sponge rope, which is not limited herein; the elastic body 44 is a spring or a metal elastic sheet, and is not limited herein; the flexible body 34 is of a hose structure, and the specific material can be rubber or plastic; the power supply part 6 is a storage battery or a battery, and is not limited here; the components can be reasonably selected by a person skilled in the art according to actual needs.
In the embodiment of the invention, the detection part 2 is used for detecting the water content of the ground soil, and when the water content of the ground soil is larger, the pressure repelling part 5 drives the supporting part 4 to move so as to reduce the drip irrigation speed of the drip irrigation part 3 and realize the interception of the drip irrigation part 3 so as to save the water consumption; when the ground soil moisture content is smaller, the pressure repellent portion 5 drives the supporting portion 4 to move in the reverse direction, so that the drip irrigation speed of the drip irrigation portion 3 is increased, and drip irrigation operation of plants is achieved.
Although the preferred embodiments of the present patent have been described in detail, the present patent is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present patent within the knowledge of those skilled in the art.
Claims (10)
1. A drip irrigation device for desert highway shelter forests is characterized by comprising a supporting part, a detection part, a drip irrigation part, a jacking part and a pressure repelling part;
the detection part is arranged on one side of the supporting part and is used for being inserted into soil so as to detect the water content of the soil;
the drip irrigation part is arranged on one side of the supporting part and is used for outputting a water source to carry out drip irrigation on the plants;
the supporting part is arranged on one side of the drip irrigation part and is used for adjusting the drip irrigation flow of the drip irrigation part;
the repulsion part is arranged on one side of the jacking part and is used for providing repulsion force for the jacking part;
when the water content in the soil is larger than a set value, the repulsive force output by the pressure repelling part is enhanced, the supporting part is driven to move to increase the interception effect of the drip irrigation part, and the drip irrigation speed of the drip irrigation part is reduced;
when the water content in the soil is smaller than a set value, the repulsive force output by the pressure repelling part is weakened, the supporting part is driven to move reversely to reduce the flow stopping effect of the drip irrigation part, and the drip irrigation speed of the drip irrigation part is improved.
2. The drip irrigation device for the desert highway shelter forest as claimed in claim 1, wherein the pressure repelling part comprises an electromagnet fixedly arranged on the inner side of the supporting part and a coil wound on the electromagnet, and the water absorbing part penetrates through the electric conductor and is connected with one end of the coil;
the output end of the power supply part is connected with the conductor through a wire, and the input end of the power supply part is connected with the other end of the coil through a wire;
the jacking portion comprises a permanent magnet arranged opposite to the electromagnet, a jacking rod arranged on one side of the permanent magnet, which is far away from the electromagnet, and a reset portion used for driving the jacking rod to move towards the electromagnet, and the magnetic poles of the electromagnet on the side opposite to the permanent magnet are the same;
one end, far away from the permanent magnet, of the top supporting rod is used for intercepting the drip irrigation part so as to intercept the drip irrigation part.
3. The drip irrigation device for the desert road shelter forest as claimed in claim 2, wherein the detection part comprises an insertion rod, an electric conductor, a water absorbing member and a power supply part,
the electric conductor is fixedly arranged at one end of the inserted link, the water absorbing piece is arranged inside the inserted link and used for absorbing water in ground soil, one end of the water absorbing piece penetrates through the electric conductor and is attached to the electric conductor, and the water absorbing piece is electrically connected with the pressing part;
the power supply part is arranged on one side of the supporting part and is used for controlling the electric conduction of the electric conductor and the pressure repelling part.
4. The drip irrigation device for the desert highway shelter forest according to claim 3, wherein the drip irrigation part comprises a liquid storage tank and a dropper arranged on one side of the liquid storage tank, a flexible body is arranged on the dropper, and one end of the top supporting rod, which is far away from the permanent magnet, acts on the flexible body.
5. The drip irrigation device for the desert highway shelter forest as claimed in any one of claims 1-4, wherein the supporting part comprises a bracket, and a first guiding part is arranged on one side of the bracket and used for providing guiding support for the movement of the inserted rod and ensuring the smooth movement of the inserted rod.
6. The drip irrigation device for the desert highway shelter forest as claimed in claim 5, wherein the first guiding part comprises a first connecting rod fixedly arranged at one side of the support and a first positioning sleeve fixedly arranged at one end of the first connecting rod far away from the support, and the inserting rod penetrates through the first positioning sleeve and is movably matched with the first positioning sleeve.
7. The drip irrigation device for the desert highway shelter forest as claimed in claim 6, wherein the first positioning sleeve is in threaded engagement with the insertion rod.
8. The drip irrigation device for the desert highway shelter forest as claimed in claim 4, wherein the side wall of the liquid storage tank is provided with a second guiding portion, and the second guiding portion is used for providing guiding support for the movement of the top supporting rod so as to ensure the smooth movement of the top supporting rod.
9. The drip irrigation device for the desert highway shelter forest as claimed in claim 8, wherein the second guiding part comprises a second positioning sleeve, the second positioning sleeve is fixedly connected with the side wall of the liquid storage tank, and the top supporting rod penetrates through the second positioning sleeve and is movably matched with the second positioning sleeve.
10. The drip irrigation device for the desert highway shelter forest as claimed in claim 9, wherein the repositioning part comprises a stopper fixedly disposed on the sidewall of the top brace, the stopper is connected to the second positioning sleeve through an elastic body, and the elastic body provides elastic support for the top brace for driving the top brace to move in the opposite direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110631473.1A CN113229114B (en) | 2021-06-07 | 2021-06-07 | Drip irrigation device for desert highway protection forest |
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| CN202110631473.1A CN113229114B (en) | 2021-06-07 | 2021-06-07 | Drip irrigation device for desert highway protection forest |
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| CN113229114B CN113229114B (en) | 2022-07-29 |
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