Thanks for noticing, I got my foot caught in one of them steam powered pumps.
多谢关心。我的脚被一个蒸汽动力泵给卡住了。
A new type of fitter mesh which is used with pumps foot-valve has been developed.
研制出了一种泵底阀用节能滤网组件，并对其节能机理进行了初步分析。
A new type of fitter mesh which is used with pumps foot-valve has been developed.
研制出了一种泵底阀用节能滤网组件，并对其节能机理进行了初步分析。
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