WO2010083765A1
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Device for preventing negative pressure of underground drip irrigation system and blockage of root system
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Design method of multi-orifice sleeve-type flow control valve and sleeve-type flow control valve
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Method for removing arsenium contained in water
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Method for synthesizing polycarboxylic acid series concrete hyper-dispersant
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Polyether-based polycarboxylic acid series hyper-dispersant and synthetizing method
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A kind of flood discharging method and flood discharging tunnel that adopts eddy flow and strong moisture mixing energy dissipation
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Submerged dark-pipe water-displacement sensing equipment
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A kind of perforating device and method thereof
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Radiation well horizontal radiation pipe full hydraulic construction equipment
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Intelligent controller for ground irrigation
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Liquamatic piston type fertilization pump
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