This pumping unit provides for the advantages of high load-carrying capacity, long life and ease of manufacture.

这种工作机构为单一的连杆机构，具有承载能力大、寿命长、制造容易的优点。

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This pumping unit provides for the advantages of high load-carrying capacity, long life and ease of manufacture.

这种工作机构为单一的连杆机构，具有承载能力大、寿命长、制造容易的优点。

youdao