CN203040321U - U-shaped drip irrigation device - Google Patents

U-shaped drip irrigation device Download PDF

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Publication number
CN203040321U
CN203040321U CN2012204167005U CN201220416700U CN203040321U CN 203040321 U CN203040321 U CN 203040321U CN 2012204167005 U CN2012204167005 U CN 2012204167005U CN 201220416700 U CN201220416700 U CN 201220416700U CN 203040321 U CN203040321 U CN 203040321U
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China
Prior art keywords
water
container
storage barrel
pipe
unit
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Expired - Fee Related
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CN2012204167005U
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Chinese (zh)
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左彬元
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左彬元
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A40/00Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
    • Y02A40/10Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
    • Y02A40/22Improving land use; Improving water use or availability; Controlling erosion

Abstract

The utility model relates to a U-shaped drip irrigation device, which belongs to a device for carrying out water and fertilizer supply on plants, in particular to the U-shaped drip irrigation device. The U-shaped drip irrigation device is characterized in that water or nutrition is formed into drips at a pipe network terminal through a conveying pipeline and is directly conveyed to the root parts of plants. An irrigation region is divided into a plurality of irrigation region units according to the terrain form or area, a U-shaped communicator-shaped sealing pipe network formed by a storage device and an exhaust pipe arranged on a branch pipe is used as liquid flow motive power, after the pressure drop and pressure stabilization, through the flow rate regulation, water forms the drip shape, and the water and fertilizer supply is directly and uniformly realized on the plants in time. The U-shaped drip irrigation device can be suitable for uneven terrain of plain, hills, plateau and the like, and can be widely used for all dry farming plants including greenhouse plants, grape, fruit trees, flowers and the like.

Description

U-shaped drip irrigation appliance
Technical field
The utility model relates to the plant irrigation system, a kind of U-shaped drip irrigation particularly, by conveyance conduit water through the two-stage step-down after, form the plant root of delivering to after dripping shape in the seedbed in the pipe network terminal, make plant can obtain the absorption of water or nutrition in time, quantitatively.
Background technology
Drip irrigation, be to be used for economizing on water most of plant irrigation system at present, one of advanced technology, though through six generations of Application and Development to the of decades, but its maximum overall thinking lacks limit: always manage in terminal water to be implemented deceleration or dwindled the runner mode, like this, should be little and uniform contradiction with the terminal pressure that drips with regard to be difficult to solving that the long distance water pressure will increase, all should be less than 1 millimeter to the small offence water passage pipe footpath that makes water-dropper on hollow billet or components and parts, screen pack is all more than 80 orders, therefore its some drawback of existing is still bright and easily see: as owing to influenced by the precipitation of impurity and mineral matter, make the hollow billet water dropper form physics or chemical clogging easily, be difficult to after the obstruction recover; The water quality requirement height; Rugged complex-terrain is difficult for implementing; The uniformity of the water dropper amount of dripping is difficult for guaranteeing; The cost cost is higher, and small size " individual farming " is irrigated and is difficult for carrying out.Therefore, water also is difficult to large scale application on world agriculture, forests and fruit industry.Existing drip irrigation is not owing to adopt the measure of step-down in the terminal employing, make the terminal discharge pressure bigger, the small offence water passage pipe footpath of the water-dropper on the hollow billet or components and parts is all less than 1 millimeter, flow to water is difficult to control, thereby causes: the uniformity of easily stopping up, dripping is low, cost is high, water quality requirement is high, complex-terrains such as desert, Qiu Ling are difficult for " individual farming " application of China of implementing, can not suit.
Summary of the invention
[0003] the utility model purpose provides a kind of U-shaped drip irrigation appliance.The utility model content is: U-shaped drip irrigation appliance, comprise the water source water facilities, water source power and pipe fitting water facilities, storage barrel, unit pipe network, hollow billet, step-down water-dropper, described storage barrel water inlet is responsible for the water source and is connected, the water side is connected with the unit pipe network, described unit pipe network arm terminal has one vertically upward and blast pipe and blowoff valve contour with the storage barrel level, the online arm of described hollow billet one end and unit pipes is connected, the hollow billet terminal is connected with the step-down water-dropper, and described step-down water-dropper is connected in the hollow billet terminal and forms and drips shape.The utility model improves at the shape formation technology of dripping of water, that is: rely on the pressure that reduces water in the pipe network to control, regulate flow, makes the pressure of hollow billet below 4 meter water columns, and minimum pipe is during greater than 3mm, and the water that flows out hollow billet can form a shape; It mainly is to be divided into several irrigated areas, unit according to the physical features form in drip irrigation district or area.
Each irrigated area, unit is made up of the unit pipe network and is carried out the step-down first time, voltage stabilizing technique, and each unit pipe network is made up of storage barrel, unit pipes host's pipe, arm, blowoff valve, blast pipe; Pipe network one end in unit is connected with water source tube, and connects storage barrel, unit pipes host's pipe, arm, blast pipe, blowoff valve successively from the current source direction; The blast pipe height equates that with the storage barrel level height size equates with branch diameter and form U font Communicating device shape that unit pipes host manages one, many of arms; Propping up length of tube determines according to internal diameter, the flow of arm; Blowoff valve is connected in the end of every arm.
Storage barrel comprises ball-cock assembly, blowoff valve, filter, outlet water control valve; The water inlet water receiving source of storage barrel is responsible for, and water outlet termination unit irrigated area is responsible for; Storage barrel is when arranging flow, and influx is more than or equal to discharge; About 50 liters in storage barrel capacity portion is from irrigating about 1.5 meters on ground; Ball-cock assembly is installed on storage barrel top, and blowoff valve is installed on storage barrel bottom, and outlet water control valve is installed between storage barrel inner float ball valve, the blowoff valve on the lower side.Hollow billet, an end is connected with arm, and the other end is connected with the step-down water-dropper, and specification is: the lucifuge silicone tube of 3 * 5mm.
The step-down water-dropper is shown in figure four: it comprises water supply connector (15), joint-cutting sebific duct (16), ball float (19), air vent (20), mat (21), container (22), siphon pipe (23), regulates siphon pipe (24); One end of water supply connector (15) is connected with hollow billet (13), and the other end is connected with joint-cutting sebific duct (16) by container (22), and internal diameter is more than or equal to 3mm; Joint-cutting sebific duct (16) internal diameter 2.5mm adopts the silicone tube material between the 3mm; Ball float (19) is hollow arbor braid handle (18); Air vent (20) is installed in container upper end; Siphon pipe (23) one ends are long, one end is short, long end is connected in air vent (20) stretches into container (22) and with ball float (19), short end is connected with adjustable pipe (24), siphon pipe (23) is that interior length is short outward, vertical height differs 2mm, siphon pipe (24), and along with the liquid in the container (22) increase and decrease and move up and down; Ball float (19) is that one of matrix is connected with joint-cutting sebific duct (16), and the other end is connected with siphon pipe (23).Described step-down water-dropper comprises water supply connector (15), joint-cutting sebific duct (16), ball float (19), air vent (20), interior mistress joins the hole, mistress's container, siphon pipe, the inner room container, the inner room container cover, ball float, mistress's container cover, mat, clamp bar, one end of described water supply connector (15) is connected with hollow billet, the other end is connected with the joint-cutting sebific duct by the inner room container cover, internal diameter is more than or equal to 3mm, described joint-cutting sebific duct (16) internal diameter 2.5mm is between the 3mm, adopt the silicone tube material, described ball float (19) is hollow arbor braid handle (18), described air vent (20) is installed in the inner room container upper end above inner room container peak level, the mistress joins the hole in described, be placed on the bottom between inner room container (22) and the mistress's container, with container bottom at a distance of 5mm, described mistress's container closure, the siphon pipe (23) that a water inlet band ball float is wherein arranged, described siphon pipe (23) is that interior length is short outward, vertical height differs 2mm, siphon pipe (23) is grown, the water inlet of band ball float stretches in mistress's container, and along with the liquid in mistress's container increase and decrease and move up and down, siphon pipe (23) has external diameter identical, the plurality of specifications that internal diameter is different, on described mistress's container a pair of clamp bar is arranged, described inner room container (22) is the irregular bottle of the formula of being sidelong, extruding middle part is with resilience, described inner room container cover be arranged at container (22) side on the upper side the internal diameter of inner room container cover (25) greater than ball float (19) external diameter.
After present technique is carried out the lowering and stabilizing blood pressure second time, water is transmitted in big runner, and nature forms a shape in terminal, in time, evenly splash into the plant irrigated area, reaching suitable various landform, to be difficult for stopping up, before reducing in the drip irrigation system many expensive device can better reach equally to reduce cost that water saving, joint are fertile, volume increase, improve work effectiveness and the quality of crop, the purpose that reduces production costs.
In order to reach above purpose, the technical solution of the utility model is following design:
(1), the irrigated area is divided into several unit, irrigated area carries out the lowering and stabilizing blood pressure first time, its effect: when the step-down second time, voltage stabilizing, the maximum pressure that can bear for the step-down water-dropper that is installed on the hollow billet provides safeguard (1); (2) filter, precipitate, discharge foreign material, (3) add chemical fertilizer; About two mu of each unit, irrigated area, and link with pipeline; On each unit, irrigated area, water enters reserves through ball-cock assembly and is about in the holder that 60 liters, terrain clearance are about 1.2 meters, and when arranging, the influx of water is always more than or equal to discharge in the holder, to keep the relatively stable of liquid level difference in the holder, enter U-shaped pipe network after filtering; Holder equates with blast pipe level height on the arm, is arranged to the Communicating device shape, as the liquid mobilization force that flows into hollow billet.
(2), at hollow billet the step-down water-dropper is installed, carry out for the second time the regulation and control of water form water and drip a shape when flowing out hollow billet.
(3), (1) respectively adorn a blowoff valve at water receiver, arm end, in order to foreign material, the dirt of removing water receiver, arm; (2) 20 purpose filters are housed in water receiver, in order to prevent the obstruction of the components and parts on arm, hollow billet and the hollow billet.
(4), all adorn one vertically upward and the blast pipe contour with the holder level at every arm end in each irrigated area, unit, it is shaped like the Communicating device shape of U font,, under less pressure, make water be full of arm smoothly hollow billet is supplied water in order to the arm pipe network.
Owing to adopted such scheme, overcome a lot of shortcomings of original drip irrigation system, be one of present irrigation method best, cheapness, suitable, that save liquid manure; Because U-shaped pipe network can be embedded in underground or be placed in the ditch of seedbed, thereby farm work is not subjected to considerable influence; Because the rational exhaust of Bian, filtration measure, whole system are difficult for stopping up, even stop up, also to get rid of easily and recover, relatively poor water source or human excrement urine all can be irrigated, and when executing chemical fertilizer, chemical fertilizer poured in the holder get final product; Because the utility model is rational in infrastructure, stable, reliable, durable in use, the cost cost is lower, can improve water and soil ground availability, reduces production costs, and improves output and the quality of work effectiveness and crop, holds susceptible to user acceptance.
Description of drawings
Below in conjunction with accompanying drawing the utility model is described further:
Fig. 1 is schematic drawing and the cross-sectional figure of holder;
Fig. 2 is irrigated area, unit schematic diagram;
Fig. 3 is the hollow billet schematic diagram;
Fig. 4 is the schematic diagram of step-down water-dropper;
Fig. 5 is the schematic diagram of U-shaped drip irrigation.
1 water source switch among Fig. 1; 2 water sources are responsible for; 3 water receivers; 4 float switches; 5 filters; Irrigated area, Unit 6 is responsible for; 7 water outlet gauge taps; 8 scum cocks; 9 blow-off pipes.
1 water source switch among Fig. 2; 2 water sources are responsible for; 3 holders; 4 ball-cock assemblys; 5 filters; Irrigated area, Unit 6 is responsible for; 7 water outlet gauge taps; 8 scum cocks; 9 blow-off pipes; 10 arms; 11 blast pipes; 12; Blowoff valve.
13 hollow billets among Fig. 3; 14 step-down water-droppers.
15 water inlet joints among Fig. 4; 16 joint-cutting sebific ducts; 17 sebific ducts seam; 18 floating ball handles; 19 ball floats; 20 air vents; 21 mats; 22 containers, 23 siphon pipes, 24 adjustable pipes.
1 water source switch among Fig. 5; 2 water sources are responsible for; 3 holders; 4 ball-cock assemblys; 5 filters; Irrigated area, Unit 6 is responsible for; 7 water outlet gauge taps; 8 scum cocks; 9 blow-off pipe water pipes; 10 arms; 11 blast pipes; 12 blowoff valves; 13 hollow billets; 14 step-down water-droppers; 25 holder bases; 26 plants; 27 water source power.
Embodiment
The water source power-equipment is responsible for the water source and is linked to each other among Fig. 5, water source gauge tap (1) is installed in the water source, irrigated area and is responsible on (2), play control irrigated area unit of flow and link to each other with holder (3), one ball-cock assembly (4) is arranged in the holder (3), filter (5), blowoff valve (8), ball-cock assembly (4), play water storage, add chemical fertilizer, filter and the blowdown effect, ball-cock assembly (4), play control, flow in the balance holder (3) and the liquid manure amount that flows out, holder (3) is connected with unit, the irrigated area person in charge (6) on the U-shaped pipe network, the unit, irrigated area is responsible for and on (6) gauge tap (7) is housed and is connected with arm (10), arm (10) end is equipped with blowoff valve (8) and vertically upward and the blast pipe (11) contour with holder (3), blast pipe (11) is connected with holder, play the Communicating device effect, blast pipe (11) plays exhaust, link to each other with some hollow billets (13) in the one or both sides, stage casing of arm (10) horizontal direction, at hollow billet (13) step-down water-dropper (14) is housed and plays step-down, voltage stabilizing, regulate terminal liquid manure flow.
After after all components and parts connect by figure among Fig. 5, opening all water source gauge taps (1), water outlet gauge tap (7), closing blowoff valve (8), (12), water source power (27)Water supply start, water is responsible for (2) and is entered each irrigated area unit switch (1) through the water source, and flow into ball-cock assembly (4), holder (3), filter (5), unit, irrigated area successively and be responsible for (6), irrigated area unit switch (7), arm (10), hollow billet (13), step-down water-dropper (14), flow out siphon pipe (24) until liquid manure, flow into plant root.
Water enters holder (3) by water source gauge tap (1) among Fig. 1, when the inflow flow in the holder (3) when flowing out flow, liquid level rises in the holder (3), when water touches ball-cock assembly (4), ball float on the ball-cock assembly (4) reduces gradually toward the inflow of come-up, ball-cock assembly (4), directly cause and close ball-cock assembly (4), otherwise, when the inflow flow in the holder (3) when flowing out flow, liquid level descends in the holder (3), the inflow of ball-cock assembly (4) increases gradually, and the influx in holder (3) equals discharge, stable level.
Liquid is often driven joint-cutting sebific duct (16) about by a 3mm in the step-down water-dropper (14) among Fig. 4, liquid flows in the container (22) of step-down water-dropper (14), when step-down water-dropper (14) when starting working, pressing down siphon pipe (23) makes container (22) be in closed state, water is by often opening the very fast outflow siphon pipe of joint-cutting sebific duct (16) (23), then, unclamp siphon pipe (23), step-down water-dropper (14) enters normal operating conditions; This is because step-down water-dropper (14) is by siphon pipe (23), and it is poor that the employing siphon principle widens the liquid of container (22), and ball float (19) can be fluctuated to greatest extent, and then makes (17) opening and closing of sebific duct seam freely; When the liquid influx is greater than discharge in the container (22), liquid is toward rising in the container (22), liquid level increases, air in the container (22) is discharged by air vent (20) simultaneously, rising or decline along with liquid in the inner room container (22), liquid in the container (22) is also along with rising or descending, at this moment siphon pipe (23) utilize the ball float (19) in the container (22) buoyancy in container (22) along with liquid fluctuates up and down and moves up and down, making the fluid pressure in the siphon pipe (23) is constant, decides the amount of dripping of siphon pipe (23) thereby can weigh; When the joint-cutting (17) of joint-cutting sebific duct (16) owing to take place physics to stop up when the liquid influx in the container (22) is less than discharge, the ball float (19) that container (22) liquid level descends, often come unglued in pipe (16) in control slowly descends, dirt is slowly opened, discharged to the joint-cutting (17) of pipe (16) of often coming unglued, after discharging dirt, the liquid that flows in the container (22) increases gradually, and it is motionless with siphon pipe (23) to equal discharge ball float (19) up to influx.Siphon pipe when work stops) 23 along with the water level in the container descends, rest on extreme lower position, and the interior water of siphon (23) does not run off, supply water next time and do not need just energy operate as normal of exhaust, when flow need be regulated, the adjustable pipe (24) that can pass through on the siphon pipe (23) is adjusted up and down, and discharge also correspondingly reduces or increases.
Respectively adorn a blowoff valve at holder, arm end, in order to foreign material, the dirt of removing water receiver, arm; (2) 20 purpose filters are housed in water receiver, in order to prevent the obstruction of the components and parts on arm, hollow billet and the hollow billet.
Holder (3) when arranging, about 50 liters of volumes, overhead vertical height is about 1.2 meters, influx makes holder (3) remain certain liquid level greater than discharge, soluble chemical fertilizer can directly be added in the holder (3); When dirt is too many in the holder (3), close water source switch (1), open blowoff valve (8), by blow-off pipe (9) dirt is discharged.
Arm (10) should be suited measures to local conditions when arranging, and extends to being responsible for (6) two ends as far as possible, influences water velocity with the friction that reduces arm (10) Zhong Shui and pipe.
Blast pipe (11) should be installed in the terminal and contour with holder (3) of arm (10) vertically upward when arranging, play Communicating device, is conducive to the pipe network exhaust.
Hollow billet (13) should shorten the vertical range with plant root as far as possible when arranging, to reduce hollow billet length.Step-down water-dropper (14) but the flow adjustable pipe regulate, flow 1 liter/per hour to 8 liters/per hour between, can freely regulate flow according to the required flow of plant.
The following material of arm is the lucifuge material, in order to restrain the growth of liverwort biology; When the device on hollow billet (13) or the hollow billet (13) takes place to stop up, can press siphon pipe, dirt is discharged automatically.
Overall setting to flow: the discharge summation of the step-down water-dropper on all irrigated areas, unit should be less than or equal to the discharge of holder, the discharge of holder is less than or equal to the influx of holder, and the influx sum of holder equals the total supply at water source on each irrigated area, unit.

Claims (6)

1.U type drip irrigation appliance, be characterised in that: comprise water source water facilities, storage barrel, unit pipe network, hollow billet, step-down water-dropper, described storage barrel water inlet is responsible for the water source and is connected, the water side is connected with the unit pipe network, described unit pipe network arm terminal has one vertically upward and blast pipe and blowoff valve contour with the storage barrel level, the online arm of described hollow billet one end and unit pipes is connected, and the hollow billet terminal is connected with the step-down water-dropper, and described step-down water-dropper is connected in the hollow billet terminal.
2. the described U-shaped drip irrigation appliance of root a tree name claim 1 is characterized in that: described unit pipe network, comprise storage barrel, unit pipes host's pipe, arm, blowoff valve, blast pipe,
Described unit pipe network one end is connected with water source tube, and connects storage barrel, unit pipes host's pipe, arm, blast pipe, blowoff valve successively from the current source direction,
Described blast pipe height equates with the storage barrel level height, and size equates with branch diameter and form U font Communicating device shape,
Described unit pipes host manages one, many of arms,
Described length of tube determine according to internal diameter, the flow of arm,
Described blowoff valve is connected in the end of every arm.
3. the described U-shaped drip irrigation appliance of root a tree name claim 1 is characterized in that: described storage barrel, comprise ball-cock assembly, blowoff valve, filter, outlet water control valve,
The water inlet water receiving source of described storage barrel is responsible for, and water outlet termination unit irrigated area is responsible for,
Described storage barrel is when arranging flow, and influx is more than or equal to discharge,
50 liters in described storage barrel capacity portion, from irrigating 1.5 meters on ground,
Described ball-cock assembly is installed on storage barrel top, and blowoff valve is installed on storage barrel bottom, and outlet water control valve is installed between storage barrel inner float ball valve, the blowoff valve on the lower side.
4. the described U-shaped drip irrigation appliance of root a tree name claim 1, it is characterized in that: described hollow billet one end is connected with arm, and the other end is connected with the step-down water-dropper, and described specification is: the lucifuge silicone tube of 3 * 5mm.
5. the described U-shaped drip irrigation appliance of root a tree name claim 1, it is characterized in that: described step-down water-dropper comprises that water supply connector (15), joint-cutting sebific duct (16), ball float (19), air vent (20), interior mistress join hole, mistress's container, siphon pipe, inner room container, inner room container cover, ball float, mistress's container cover, mat, clamp bar
One end of described water supply connector (15) is connected with hollow billet, and the other end is connected with the joint-cutting sebific duct by the inner room container cover, and internal diameter is more than or equal to 3mm,
Described joint-cutting sebific duct (16) internal diameter 2.5mm adopts the silicone tube material between the 3mm,
Described ball float (19) is hollow arbor braid handle (18),
Described air vent (20) is installed in the inner room container upper end above inner room container peak level,
The mistress joins the hole in described, is placed on the bottom between inner room container (22) and the mistress's container, with container bottom 5mm apart,
Described mistress's container closure wherein has the siphon pipe (23) of a water inlet band ball float,
Described siphon pipe (23) is that interior length is short outward, vertical height differs 2mm, and siphon pipe (23) water inlet long, the band ball float stretches in mistress's container, and moves up and down along with the increase and decrease of the liquid in mistress's container, siphon pipe (23) has the plurality of specifications that external diameter is identical, internal diameter is different
On described mistress's container a pair of clamp bar is arranged,
Described inner room container (22) is the irregular bottle of the formula of being sidelong, and the extruding middle part is with resilience,
Described inner room container cover be arranged at container (22) side on the upper side the internal diameter of inner room container cover (25) greater than ball float (19) external diameter.
6. the described U-shaped drip irrigation appliance of root a tree name claim 1, it is characterized in that: described overall setting to flow: the discharge summation of the step-down water-dropper on all irrigated areas, unit should be less than or equal to the discharge of holder, the discharge of holder is less than or equal to the influx of holder, and the influx sum of holder equals the total supply at water source on each irrigated area, unit.
CN2012204167005U 2012-08-22 2012-08-22 U-shaped drip irrigation device Expired - Fee Related CN203040321U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2012204167005U CN203040321U (en) 2012-08-22 2012-08-22 U-shaped drip irrigation device

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Application Number Priority Date Filing Date Title
CN2012204167005U CN203040321U (en) 2012-08-22 2012-08-22 U-shaped drip irrigation device

Publications (1)

Publication Number Publication Date
CN203040321U true CN203040321U (en) 2013-07-10

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Application Number Title Priority Date Filing Date
CN2012204167005U Expired - Fee Related CN203040321U (en) 2012-08-22 2012-08-22 U-shaped drip irrigation device

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102792875A (en) * 2012-08-22 2012-11-28 左彬元 U-shaped drip irrigator
CN103947511A (en) * 2014-04-22 2014-07-30 青岛农业大学 Irrigation system applicable to irregular-shaped irrigation region and irrigation method
CN104396696A (en) * 2014-09-23 2015-03-11 南京理工大学 Water-saving quantity-control drip irrigation controller
CN105230443A (en) * 2015-11-02 2016-01-13 深圳文科园林股份有限公司 Method for simultaneously irrigating multi-stage slope

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102792875A (en) * 2012-08-22 2012-11-28 左彬元 U-shaped drip irrigator
CN103947511A (en) * 2014-04-22 2014-07-30 青岛农业大学 Irrigation system applicable to irregular-shaped irrigation region and irrigation method
CN104396696A (en) * 2014-09-23 2015-03-11 南京理工大学 Water-saving quantity-control drip irrigation controller
CN105230443A (en) * 2015-11-02 2016-01-13 深圳文科园林股份有限公司 Method for simultaneously irrigating multi-stage slope

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Granted publication date: 20130710

Termination date: 20140822