作者: Jacques A. Van Der Borght
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摘要: A suction control tail for use with the water pump to restrict velocities in a well hole and thereby prevent instrusion of sand is provided by two-layer element, or such an element combination single-layer element. Each two elements has porous, permeable sidewall, open at bottom admit any suspended particles, top hydraulically couple inlet base another The two-layered formed relatively rigid PVC tube multiplicity opening therethrough outer layer over openings bonded granular single similar, having uniform diminishing cross-sectional area so as into