This also permits circulation of a flushing medium around the plug.

这也允许围绕阀塞的冲刷流体介质的循环。

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The main reasons are medium erosion and flushing, and the welding specification.

主要原因是介质腐蚀和冲刷以及焊接工艺。

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Mainly used in geology, shallow water, oil, frozen construction well drilling in the supply of flushing fluid, medium for mud, water, can also be used as an infusion pump above.

主要用于地质、水源、浅层石油、冻结施工建井等钻进中供给冲洗液用，介质可为泥浆、清水等，亦可作为以上的输液泵。

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