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well washing
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well washing
Encyclopedia
理学
水井钻进作业
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well washing
洗井
水井打成之后,需替换和清洗井内的泥浆、沉淀物,以及井壁泥皮和含水层孔隙内的堵塞物等,使砾料和靠近砾料含水层中的颗粒重新按其大小自然排列,以形成良好的人工过滤层,水流畅通并达到水清、砂净的作业。
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measurement reliability
measurement result
measurement scale
measurement scales
Measurements of Non-Volant Small Mammals
Measurements of Rodent’s Skull
measurement standard
measurement standard for heterodyne laser interferometer
measurement standard forlarge-scale dimensional spatial coordinate
measurement standard of coordinate measuring machine
measurement standard of one dimensional multi-size artifacts
measurement standard of radiation
measurement standard of two dimensional multi-size artifacts
measurement standard sampling test
measurement standards for general purpose metric screw threads
measurements with angle gauge
measurement system
measurement system for aircraft assembly
Measurement system of lithography machine
measurement technique of nuclear test
measurement technology for multi-phase flow
measurement theory
measurement uncertainty
measurement unit
measurement validity
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