Recently, “the water table has dropped down so much that my pump was sucking air.”
近来，“水位下降的很快以致于我的水泵根本抽不到水了”。
2
One of the 4 items decided at the vacuum trade meeting in 1974 was to raise the pumping speed of oil booster pump following the raise of sucking pressure.
1974年真空行业会议确定四大攻关项目之一是油增压泵对应高吸入压强提高抽速。
3
This paper introduces the hydraulic and structure design of double channel non-jamed pump for sucking sludge .