General beam pumping system should be the overall efficiency of about 50% if less than this should improve its performance.
一般游梁式抽油系统的总效率应为50%左右,若低于此应提高其性能。
General beam pumping system should be the overall efficiency of about 50% if less than this should improve its performance.
一般游梁式抽油系统的总效率应为50%左右,若低于此应提高其性能。
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