Pumping recovery well has a low efficiency in system generally at present.

抽油机井目前普遍存在系统效率偏低的问题。

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The software can help stylist design the pumping unit well.

这套软件，能够帮助设计人员更好的完成抽油机的概念设计。

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It is no use pumping a dry well.

干井中抽水，徒劳无功。

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It is no use pumping a dry well.

干井中抽水，徒劳无功。

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