This thesis makes a systematic and thorough research and study on the stroke lengthening and power saving modification of oil field conventional beam-pumping units in service ( four-bar linkage ).
本文对油田在役常规游梁式抽油机(四杆机)的增程和节能改造问题进行了系统而深入的研究。
参考来源 - 油田在役常规游梁式抽油机的增程与节能改造研究·2,447,543篇论文数据,部分数据来源于NoteExpress
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