在潜水位较浅的钻孔中,用离心泵或活塞泵进行抽水试验时,由于钻孔直径过小,吸水管及测水管不能同时下人孔内,无法观测动水位,经过大家献计献策,制成一种足阀(底阀),解决了这一困难。因为是在祖国大跃进形势下产生的,故命名为“跃进式足阀”。介绍如下。 In shallow drilling, when using a centrifugal pump or a piston pump to perform a pumping test, the diameter of the drill hole is too small. The suction pipe and the measuring pipe cannot be put into the hole at the same time, and the dynamic water level cannot be observed. A foot valve (bottom valve) is made to solve this difficulty. Because it was born under the situation of the Great Leap Forward of the motherland, it was named “Leaping Foot Valve.” Introduced as follows.