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 experimental results show that forward pumping time and reverse pumping time are important parameters for semiconductor opening switches.
结果表明，正、反向泵浦时间是影响半导体断路开关特性的最主要因素。
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 has introduced constructional properties, applicable sphere of pumping reverse circulation drilling, and its technical demands and the reasons of common hitchs and processing methods.
介绍了泵吸反循环钻进的施工特点、适用范围、施工中的技术要求与常见故障的原因及处理方法。
Compared to artificial digging-hole pile, the pumping reverse-circulation under-reamed bored pile has higher adaptability to geological condition, and its construction is safety and reliability.
泵吸反循环钻孔扩底灌注桩与人工挖孔灌注桩相比，地质条件的适应性强，施工安全可靠。
The pumping condition is one of the most important influence factors for SOS characteristics. The higher the pumping voltage is, the higher the reverse over-voltage coefficient is.
泵浦条件是影响SOS特性的最主要因素，泵浦电压越高，所产生的反向过电压系数越高。
The force conditions of the chain on a chain drive pumping unit without reverse rack are much more favorable than that on conventional chain drive pumping units, and can be well controlled.
无换向架链条抽油机的链条承受的总拉力为悬点载荷与平衡重的差值加连杆对链条的水平分力在链条上形成的附加拉力之和，受力状况优于普通链条抽油机，且能得到控制。
The drum type pumping unit with the new reverse mechanism has the advantages of impact structure, light weight and extended gear reducer life.
采用这种机构设计出的滚筒机具有结构紧凑、重量轻及减速器寿命长等优点。
The Pumping unit has a double-chain synchronous driving and reverse mechanism, and can realize flexible reverse with stroke increment;
抽油机具有双链条同步驱动换向机构，可实现增距式柔性换向；
The Pumping unit has a double-chain synchronous driving and reverse mechanism, and can realize flexible reverse with stroke increment;
抽油机具有双链条同步驱动换向机构，可实现增距式柔性换向；
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