久久综合狠狠综合久久激情,本大道久久A久久综合,一本久道久久综合狠狠躁

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           knowledge about irrigation
        knowledge about irrigation
         
        knowledge about irrigation/Knowledge About Irrigation

        Theory of Drip Irrigation
         
        Theory of drip irrigation:water is pumped from the source and transported to the pipes in the field. water will go out through the outlets. fertilizers can be dissolved into the water and feed to the plant in the same way.
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        @ 2009 -2010 Tangshan Raingod Irrigation Technology Co., Ltd  Record:Hebei ICP No. 05010608
        久久综合狠狠综合久久激情,本大道久久A久久综合,一本久道久久综合狠狠躁