The adjustable diameter and changeable toque pumping unit is a new type of pumping unit with unusual balance equipment,which is improved on the basis of front mounted beam pumping unit.
调径变矩抽油机是在前置式游梁抽油机的基础上采用新型平衡方案的一种节能型抽油机。
参考来源 - 调径变矩抽油机在长庆油田的应用·2,447,543篇论文数据，部分数据来源于NoteExpress
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