CN106211834A - A kind of anticorrosive salt discharging pipe and the application in the salt discharge of salt-soda soil thereof - Google Patents
A kind of anticorrosive salt discharging pipe and the application in the salt discharge of salt-soda soil thereof Download PDFInfo
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
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Abstract
The present invention provide a kind of anticorrosive salt discharging pipe to include hidden pipe and pervious bed, described hidden pipe outer surface are wound with shade net, described pervious bed includes lower pervious bed and upper pervious bed.The present invention provides and also provides for the application in the salt discharge of salt-soda soil of a kind of anticorrosive salt discharging pipe.Hidden pipe of the present invention, tensile break strength is 52 65 MPa, and tensile yield strength is 50 63 MPa, and resistance to corrosion is up to 100% simultaneously；Using the salt discharging pipe of the present invention after salt-soda soil carries out salt discharge 1 year, the soil general porosity enhancing rate in salt-soda soil is 20.0 28.0%, and soil weight rate of descent 10.0 15.0%, the salt rejection rate of salt discharging pipe reaches 83.7 90.0%；The plant planted after using the salt discharging pipe salt discharge improvement salt-soda soil of the present invention, survival rate is high, and plant root growth is rapid.
Description
Technical field
The invention belongs to alkaline land improving technical field, be specifically related to a kind of anticorrosive salt discharging pipe and in salt-soda soil salt discharge
In application.
Background technology
Saline-alkali soil has that salinity is high, nutrient is low, proportion and unit weight is big, porosity and the shortcoming such as infiltration coefficient is little, greatly
Constrain ecological construction and the agricultural production of coastal region.And at area, salt-soda soil, freshwater resources famine, irrigation conditions
Extremely limited, it is the principal element affecting plant growing.Therefore, the ecological problem in area, salt-soda soil to be improved, fundamentally compel
Being essential to be solved is the thorough improvement problem in salt-soda soil.
The soil moved in improve the original planting technology of technology maturation is still continued to use in the at present planting technique of coastal area, but soil moved in improve the original planting technology
Relatively big to the farmland destructiveness in region of fetching earth, even destroy the ecological environment of locality, and for a long time, substantial amounts of planting soil transported
Journey, causes road traffic to strengthen, and easily causes congestion in road, and heavy goods vehicles has had a strong impact on again the service life of road, discharge
Tail gas pollutes again environment, flows to energy flow from goods and materials and all causes waste greatly, has also had a strong impact on the quality of environment.And
And, this planting technique can not fundamentally improve and improve the soil in salt-soda soil.
And at present in alkaline land improving technology, the general salt discharging pipe salt discharge technology that uses, but, existing salt discharging pipe salt discharge
There is many drawbacks in technology, such as:
1, existing hidden pipe body, tensile break strength, tensile yield strength are relatively low, and resistance to corrosion is poor；
2, using existing salt discharging pipe after salt-soda soil carries out salt discharge 1 year, the soil general porosity in salt-soda soil is relatively low, salt discharging pipe
Salt rejection rate is low；
3, the plant planted after using existing salt discharging pipe salt discharge improvement salt-soda soil, survival rate is low, and plant root growth is slow.
In summary, prior art there will naturally be inconvenience and defect in actual use, it is therefore necessary to improved.
Summary of the invention
For solving technical problem present in prior art, the present invention provides a kind of anticorrosive salt discharging pipe and in salt-soda soil
Application in salt discharge, to realize following goal of the invention:
(1) hidden pipe of the present invention, tensile break strength is 52-65 MPa, and tensile yield strength is 50-63 MPa, simultaneously
Resistance to corrosion is up to 100%；
(2) using the salt discharging pipe of the present invention after salt-soda soil carries out salt discharge 1 year, the soil general porosity enhancing rate in salt-soda soil is
20.0-28.0%, soil weight rate of descent 10.0-15.0%, the salt rejection rate of salt discharging pipe reaches 83.7-90.0%；
(3) plant planted after using the salt discharging pipe salt discharge improvement salt-soda soil of the present invention, survival rate is high, and plant root growth is fast
Speed.
For solving above-mentioned technical problem, the technical scheme that the present invention takes is as follows:
A kind of anticorrosive salt discharging pipe, including hidden pipe and pervious bed, described hidden pipe outer surface is wound with shade net, described pervious bed bag
Include lower pervious bed and upper pervious bed.
The following is and the further of technique scheme is improved:
Described lower pervious bed is laid the most successively: geotechnique layer of cloth, Margarita rock stratum, the first mixed layer；
Described upper pervious bed is laid the most successively: the second mixed layer, rotted leaf soil layer.
Described first mixed layer and the second mixed layer all consist of the following composition:
PE regeneration granule and Caulis et Folium Oryzae, PE regeneration granule and Caulis et Folium Oryzae mix according to the volume ratio of 4-6:2 to be laid；The grain of PE regeneration granule
Footpath is 0.5-1cm；The long 2-3cm of Caulis et Folium Oryzae.
The upper surface of described first mixed layer tilts to lay, and the upper surface of the first mixed layer and the angle of horizontal plane are 2.0-
2.6 °, the hidden pipe winding shade net is layed on the upper surface of the first mixed layer and fills laying the second mixed layer to flat
Row is 2.0-2.6 ° in horizontal plane, described hidden pipe with the angle of horizontal plane；
The gross thickness of the first mixed layer and the second mixed layer is 70-76cm.
Described perlite thickness 5-10cm, Margarita rock stratum is perlite, and perlitic particle diameter is 1-2cm, perlitic contains
The water yield is 3-5%.
Described leaf mould thickness 10-14cm, rotted leaf soil layer is leaf mould, and the particle diameter of leaf mould is 0.3-0.5cm, leaf mould
PH be 5.3-5.5.
Between described Margarita rock stratum and the first mixed layer, between the second mixed layer and rotted leaf soil layer, all it is equipped with permeable nonwoven
Layer of cloth, permeable nonwoven layer is permeable non-woven fabrics, and permeable non-woven fabrics lays 2 layers；
Described hidden pipe is to be formed by the Raw material processing of following weight portion:
Low Density Polyethylene 100-120 part, thermoplastic elastomer (TPE) 47-57 part, polyphenylene oxide 10-20 part, chitosan 3.0-7.0 part,
Sorbitol 2.5-3.5 part, Firebrake ZB 1.0-2.0 part, viscose glue 4.8-5.8 part, ammonium dihydrogen phosphate 2.8-3.2 part, aminomethyl phenyl
Silicone oil 4.2-4.6 part, dibutyl phthalate 1.5-2.5 part, asbestos 1.0-2.0 part, tert-butylhydroquinone 3.1-3.8
Part, stearic acid 2.0-3.2 part.
Described hidden pipe is PE corrugated tube, and a diameter of 120-130mm in maximum cross-section of described hidden pipe, the smallest cross-sectional of hidden pipe is straight
Footpath is 110-120mm, and the tube wall that the smallest cross-sectional diameter of hidden pipe is corresponding is provided with the permeable gap of rectangle, the permeable gap of rectangle
A length of 2.0-2.5cm, a width of 3-5mm in the permeable gap of rectangle.
The application in the salt discharge of salt-soda soil of a kind of anticorrosive salt discharging pipe, lays 10cm dressing layer, institute bottom salt discharging pipe ditch
Stating dressing layer is haydite.
Compared with prior art, the invention have the benefit that
(1) hidden pipe of the present invention, tensile break strength is 52-65 MPa, and tensile yield strength is 50-63 MPa, simultaneously
Resistance to corrosion is up to 100%；
(2) using the salt discharging pipe of the present invention after salt-soda soil carries out salt discharge 1 year, the soil general porosity enhancing rate in salt-soda soil is
20.0-28.0%, soil weight rate of descent is 10.0-15.0%, and the salt rejection rate of salt discharging pipe reaches 83.7-90.0%；
(3) plant planted after using the salt discharging pipe salt discharge improvement salt-soda soil of the present invention, survival rate is high, and plant root growth is fast
Speed, as a example by acer monoes, the acer monoes survival rate of transplanting is up to 99.0-100.0%, and acer monoes transplants First Year root growth speed
Degree increase rate is 37.5%-45.0%, and it is 35.0%-47.0% that acer monoes transplants Second Year root growth speed increase rate.
Detailed description of the invention
Below by way of specific embodiment, the present invention is described, but the present invention is not merely defined in these embodiments.
1 one kinds of anticorrosive salt discharging pipes of embodiment
A kind of anticorrosive salt discharging pipe, including hidden pipe and pervious bed,
Described hidden pipe is to be formed by the Raw material processing of following weight portion:
Low Density Polyethylene 100 parts, thermoplastic elastomer (TPE) 47 parts, polyphenylene oxide 10 parts, chitosan 3.0 parts, Sorbitol 2.5 parts,
Firebrake ZB 1.0 parts, viscose glue 4.8 parts, ammonium dihydrogen phosphate 2.8 parts, methyl phenyl silicone oil 4.2 parts, dibutyl phthalate 1.5
Part, 1.0 parts of asbestos, tert-butylhydroquinone 3.1 parts, stearic acid 2.0 parts.
Described hidden pipe is PE corrugated tube, and a diameter of 120mm in maximum cross-section of described hidden pipe, the smallest cross-sectional of hidden pipe is a diameter of
110mm, the tube wall that the smallest cross-sectional diameter of hidden pipe is corresponding is provided with the permeable gap of rectangle, the permeable gap of rectangle a length of
2.0cm, a width of 3mm in the permeable gap of rectangle.
Described hidden pipe outer surface is wound with shade net, and the specification of shade net is 6 pins；
Described pervious bed includes lower pervious bed and upper pervious bed,
Described lower pervious bed is laid the most successively: geotechnique layer of cloth, Margarita rock stratum, the first mixed layer；
Described upper pervious bed is laid the most successively: the second mixed layer, rotted leaf soil layer；
Between described Margarita rock stratum and the first mixed layer, between the second mixed layer and rotted leaf soil layer, all it is equipped with permeable non-woven fabrics
Layer, permeable nonwoven layer is permeable non-woven fabrics, and permeable non-woven fabrics lays 2 layers；
Described geotechnique's layer of cloth is geotextiles, and the material of geotextiles is polypropylene, and the elongation of geotextiles is 100%, and tearing brute force is
0.6KN；
Described perlite thickness 5cm, Margarita rock stratum is perlite, and perlitic particle diameter is 1-2cm, and perlitic water content is 3-
5%；
Described first mixed layer and the second mixed layer all consist of the following composition:
PE regeneration granule and Caulis et Folium Oryzae, PE regeneration granule and Caulis et Folium Oryzae mix according to the volume ratio of 6:2 to be laid；The particle diameter of PE regeneration granule
For 0.5-1cm；The long 2-3cm of Caulis et Folium Oryzae；
The upper surface of described first mixed layer tilts to lay, and the upper surface of the first mixed layer and the angle of horizontal plane are 2.0 °, will
The hidden pipe winding shade net is layed on the upper surface of the first mixed layer and fills laying the second mixed layer to being parallel to water
Plane, described hidden pipe is 2.0 ° with the angle of horizontal plane；
The gross thickness of the first mixed layer and the second mixed layer is 70cm；
Described leaf mould thickness 10cm, rotted leaf soil layer is leaf mould, and the particle diameter of leaf mould is 0.3-0.5cm, and the pH of leaf mould is
5.3-5.5。
2 one kinds of anticorrosive salt discharging pipes of embodiment
A kind of anticorrosive salt discharging pipe, including hidden pipe and pervious bed,
Described hidden pipe is to be formed by the Raw material processing of following weight portion:
Low Density Polyethylene 110 parts, thermoplastic elastomer (TPE) 52 parts, polyphenylene oxide 15 parts, chitosan 5.0 parts, Sorbitol 3.0 parts,
Firebrake ZB 1.5 parts, viscose glue 5.3 parts, ammonium dihydrogen phosphate 3.0 parts, methyl phenyl silicone oil 4.4 parts, dibutyl phthalate 2.0
Part, 1.5 parts of asbestos, tert-butylhydroquinone 3.4 parts, stearic acid 2.6 parts.
Described hidden pipe is PE corrugated tube, and a diameter of 125mm in maximum cross-section of described hidden pipe, the smallest cross-sectional of hidden pipe is a diameter of
115mm, the tube wall that the smallest cross-sectional diameter of hidden pipe is corresponding is provided with the permeable gap of rectangle, the permeable gap of rectangle a length of
2.3cm, a width of 4mm in the permeable gap of rectangle.
Described hidden pipe outer surface is wound with shade net, and the specification of shade net is 6 pins；
Described pervious bed includes lower pervious bed and upper pervious bed,
Described lower pervious bed is laid the most successively: geotechnique layer of cloth, Margarita rock stratum, the first mixed layer；
Described upper pervious bed is laid the most successively: the second mixed layer, rotted leaf soil layer；
Between described Margarita rock stratum and the first mixed layer, between the second mixed layer and rotted leaf soil layer, all it is equipped with permeable non-woven fabrics
Layer, permeable nonwoven layer is permeable non-woven fabrics, and permeable non-woven fabrics lays 2 layers；
Described geotechnique's layer of cloth is geotextiles, and the material of geotextiles is polypropylene, and the elongation of geotextiles is 100%, and tearing brute force is
0.6KN；
Described perlite thickness 7.5cm, Margarita rock stratum is perlite, and perlitic particle diameter is 1-2cm, and perlitic water content is
3-5%；
Described first mixed layer and the second mixed layer all consist of the following composition:
PE regeneration granule and Caulis et Folium Oryzae, PE regeneration granule and Caulis et Folium Oryzae mix according to the volume ratio of 5:2 to be laid；The particle diameter of PE regeneration granule
For 0.5-1cm；The long 2-3cm of Caulis et Folium Oryzae；
The upper surface of described first mixed layer tilts to lay, and the upper surface of the first mixed layer and the angle of horizontal plane are 2.3 °, will
The hidden pipe winding shade net is layed on the upper surface of the first mixed layer and fills laying the second mixed layer to being parallel to water
Plane, described hidden pipe is 2.3 ° with the angle of horizontal plane；
The gross thickness of the first mixed layer and the second mixed layer is 73cm；
Described leaf mould thickness 12cm, rotted leaf soil layer is leaf mould, and the particle diameter of leaf mould is 0.3-0.5cm, and the pH of leaf mould is
5.3-5.5。
3 one kinds of anticorrosive salt discharging pipes of embodiment
A kind of anticorrosive salt discharging pipe, including hidden pipe and pervious bed,
Described hidden pipe is to be formed by the Raw material processing of following weight portion:
Low Density Polyethylene 120 parts, thermoplastic elastomer (TPE) 57 parts, polyphenylene oxide 20 parts, chitosan 7.0 parts, Sorbitol 3.5 parts,
Firebrake ZB 2.0 parts, viscose glue 5.8 parts, ammonium dihydrogen phosphate 3.2 parts, methyl phenyl silicone oil 4.6 parts, dibutyl phthalate 2.5
Part, 2.0 parts of asbestos, tert-butylhydroquinone 3.8 parts, stearic acid 3.2 parts.
Described hidden pipe is PE corrugated tube, and a diameter of 130mm in maximum cross-section of described hidden pipe, the smallest cross-sectional of hidden pipe is a diameter of
120mm, the tube wall that the smallest cross-sectional diameter of hidden pipe is corresponding is provided with the permeable gap of rectangle, the permeable gap of rectangle a length of
2.5cm, a width of 5mm in the permeable gap of rectangle.
Described hidden pipe outer surface is wound with shade net, and the specification of shade net is 6 pins；
Described pervious bed includes lower pervious bed and upper pervious bed,
Described lower pervious bed is laid the most successively: geotechnique layer of cloth, Margarita rock stratum, the first mixed layer；
Described upper pervious bed is laid the most successively: the second mixed layer, rotted leaf soil layer；
Between described Margarita rock stratum and the first mixed layer, between the second mixed layer and rotted leaf soil layer, all it is equipped with permeable non-woven fabrics
Layer, permeable nonwoven layer is permeable non-woven fabrics, and permeable non-woven fabrics lays 2 layers；
Described geotechnique's layer of cloth is geotextiles, and the material of geotextiles is polypropylene, and the elongation of geotextiles is 100%, and tearing brute force is
0.6KN；
Described perlite thickness 10cm, Margarita rock stratum is perlite, and perlitic particle diameter is 1-2cm, and perlitic water content is
3-5%；
Described first mixed layer and the second mixed layer all consist of the following composition:
PE regeneration granule and Caulis et Folium Oryzae, PE regeneration granule and Caulis et Folium Oryzae mix according to the volume ratio of 4:2 to be laid；The particle diameter of PE regeneration granule
For 0.5-1cm；The long 2-3cm of Caulis et Folium Oryzae；
The upper surface of described first mixed layer tilts to lay, and the upper surface of the first mixed layer and the angle of horizontal plane are 2.6 °, will
The hidden pipe winding shade net is layed on the upper surface of the first mixed layer and fills laying the second mixed layer to being parallel to water
Plane, described hidden pipe is 2.6 ° with the angle of horizontal plane；
The gross thickness of the first mixed layer and the second mixed layer is 76cm；
Described leaf mould thickness 14cm, rotted leaf soil layer is leaf mould, and the particle diameter of leaf mould is 0.3-0.5cm, and the pH of leaf mould is
5.3-5.5。
The application in the salt discharge of salt-soda soil of the 4 one kinds of anticorrosive salt discharging pipes of embodiment
1, salt discharge pipe trench and the channel that catchments are dug
Digging salt discharge pipe trench in salt-soda soil, salt discharging pipe ditch depth 120cm, adjacent salt discharge pipe trench ditch is away from for 1.8m；Braiding channel is deep
150cm, salt discharge pipe trench is vertical with braiding channel to be dug.
2, salt discharging pipe is laid
Laying 10cm dressing layer bottom salt discharging pipe ditch, described dressing layer is haydite.
Lay the salt discharging pipe of embodiment 1-3 on the top of dressing layer, wherein, the exit of described hidden pipe is connected with braiding channel
Logical.
3, improve salt-soda soil and plant
Hidden pipe lay after, original soil is backfilling into salt discharge pipe trench until with salt-soda soil ground level.Make after original soil backfill
Acer monoes is planted with after the salt discharging pipe 1 year of the present invention.
Hidden pipe of the present invention is arranged in the second mixed layer, and the separating surface of the first mixed layer and the second mixed layer with
The plane at the bottom surface place of hidden pipe is separating surface.
Result detects:
(1) hidden pipe of the present invention, tensile break strength is 52-65 MPa, and tensile yield strength is 50-63 MPa, simultaneously
Resistance to corrosion is up to 100%, and specific targets are shown in Table 1；
Table 1 hidden pipe of the present invention tensile break strength, tensile yield strength, resistance to corrosion detection data
(2) using the salt discharging pipe of the present invention after salt-soda soil carries out salt discharge 1 year, the soil general porosity enhancing rate in salt-soda soil is
20.0-28.0%, soil weight rate of descent is 10.0-15.0%, and the salt rejection rate of salt discharging pipe reaches 83.7-90.0%, and specific targets are shown in Table
2；
Indices detection data in table 2 alkaline land soil
(3) plant planted after using the salt discharging pipe salt discharge improvement salt-soda soil of the present invention, survival rate is high, and plant root growth is fast
Speed, as a example by acer monoes, the acer monoes survival rate of transplanting is up to 99.0-100.0%, and acer monoes transplants First Year root growth speed
Degree increase rate is 37.5%-45.0%, and it is 35.0%-47.0% that acer monoes transplants Second Year root growth speed increase rate, refers specifically to
Mark is shown in Table 3；
Table 3 acer monoes survival rate, the speed of growth are added up
Comparison: the acer monoes planted after using common salt discharging pipe salt discharge.
The present invention salt discharging pipe also other plant is tested in the application of salt-soda soil salt discharge, test effect
Good, list the most one by one at this.
Finally it is noted that the foregoing is only the preferred embodiments of the present invention, it is not limited to the present invention,
Although being described in detail the present invention with reference to previous embodiment, for a person skilled in the art, it still may be used
So that the technical scheme described in foregoing embodiments to be modified, or wherein portion of techniques feature is carried out equivalent.
All within the spirit and principles in the present invention, any modification, equivalent substitution and improvement etc. made, should be included in the present invention's
Within protection domain.
Claims (10)
1. an anticorrosive salt discharging pipe, it is characterised in that: include that hidden pipe and pervious bed, described hidden pipe outer surface are wound with and shelter from heat or light
Net, described pervious bed includes lower pervious bed and upper pervious bed.
The anticorrosive salt discharging pipe of one the most according to claim 1, it is characterised in that:
Described lower pervious bed is laid the most successively: geotechnique layer of cloth, Margarita rock stratum, the first mixed layer；
Described upper pervious bed is laid the most successively: the second mixed layer, rotted leaf soil layer.
The anticorrosive salt discharging pipe of one the most according to claim 2, it is characterised in that:
Described first mixed layer and the second mixed layer all consist of the following composition:
PE regeneration granule and Caulis et Folium Oryzae, PE regeneration granule and Caulis et Folium Oryzae mix according to the volume ratio of 4-6:2 to be laid；The grain of PE regeneration granule
Footpath is 0.5-1cm；The long 2-3cm of Caulis et Folium Oryzae.
The anticorrosive salt discharging pipe of one the most according to claim 2, it is characterised in that:
The upper surface of described first mixed layer tilts to lay, and the upper surface of the first mixed layer and the angle of horizontal plane are 2.0-
2.6 °, the hidden pipe winding shade net is layed on the upper surface of the first mixed layer and fills laying the second mixed layer to flat
Row is 2.0-2.6 ° in horizontal plane, described hidden pipe with the angle of horizontal plane；
The gross thickness of the first mixed layer and the second mixed layer is 70-76cm.
The anticorrosive salt discharging pipe of one the most according to claim 2, it is characterised in that:
Described perlite thickness 5-10cm, Margarita rock stratum is perlite, and perlitic particle diameter is 1-2cm, perlitic water content
For 3-5%.
The anticorrosive salt discharging pipe of one the most according to claim 2, it is characterised in that:
Described leaf mould thickness 10-14cm, rotted leaf soil layer is leaf mould, and the particle diameter of leaf mould is 0.3-0.5cm, the pH of leaf mould
For 5.3-5.5.
The anticorrosive salt discharging pipe of one the most according to claim 2, it is characterised in that:
Between described Margarita rock stratum and the first mixed layer, between the second mixed layer and rotted leaf soil layer, all it is equipped with permeable non-woven fabrics
Layer, permeable nonwoven layer is permeable non-woven fabrics, and permeable non-woven fabrics lays 2 layers.
The anticorrosive salt discharging pipe of one the most according to claim 1, it is characterised in that:
Described hidden pipe is to be formed by the Raw material processing of following weight portion:
Low Density Polyethylene 100-120 part, thermoplastic elastomer (TPE) 47-57 part, polyphenylene oxide 10-20 part, chitosan 3.0-7.0 part,
Sorbitol 2.5-3.5 part, Firebrake ZB 1.0-2.0 part, viscose glue 4.8-5.8 part, ammonium dihydrogen phosphate 2.8-3.2 part, aminomethyl phenyl
Silicone oil 4.2-4.6 part, dibutyl phthalate 1.5-2.5 part, asbestos 1.0-2.0 part, tert-butylhydroquinone 3.1-3.8
Part, stearic acid 2.0-3.2 part.
The anticorrosive salt discharging pipe of one the most according to claim 1, it is characterised in that:
Described hidden pipe is PE corrugated tube, and a diameter of 120-130mm in maximum cross-section of described hidden pipe, the smallest cross-sectional of hidden pipe is a diameter of
110-120mm, the tube wall that the smallest cross-sectional diameter of hidden pipe is corresponding is provided with the permeable gap of rectangle, the length in the permeable gap of rectangle
For 2.0-2.5cm, a width of 3-5mm in the permeable gap of rectangle.
10. the anticorrosive salt discharging pipe application in the salt discharge of salt-soda soil, it is characterised in that:
Laying 10cm dressing layer bottom salt discharging pipe ditch, described dressing layer is haydite.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110105009A (en) * | 2018-02-01 | 2019-08-09 | 广东清大同科环保技术有限公司 | A kind of permeable drainpipe |
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| CN105419017A (en) * | 2015-12-07 | 2016-03-23 | 湖北洋田塑料制品有限公司 | High-temperature-oil-resistant thermoplastic elastomer and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110105009A (en) * | 2018-02-01 | 2019-08-09 | 广东清大同科环保技术有限公司 | A kind of permeable drainpipe |
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