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foot valve
Check or replace the bottom valve.
检查或更换底阀。
youdao
Study on the Application of SD Tank Bottom Valve in Stilt Pipe Settling Tank of Brine.
SD池底阀在卤水斜管沉淀池中的应用研究。
This paper introduces the drawing water principle and economic benefits of pump haven't bottom valve.
介绍水泵无底阀抽水原理及经济效益。
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