The main drive chain and the bearing chain divide the polished rod load into reverse pumping load and equilibrium load.
主传动链与承载链将悬点载荷分解为换向抽汲载荷与平衡载荷。
The paper analyzes the pros and cons of the reduction of pipe diameter, and points out that the proper reverse pumping can in effect elongate the pigging period.
分析了当量管径缩小的利弊，为管道的最佳运行提供了参考。
The paper analyzes the pros and cons of the reduction of pipe diameter, and points out that the proper reverse pumping can in effect elongate the pigging period.
分析了当量管径缩小的利弊，为管道的最佳运行提供了参考。
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