The paper gives a detailed analysis of the design method causing rod string dropout and points out its inadequacies.
文章对抽油杆柱断脱的设计方法进行了详细的理论分析，指出了其中存在的问题。
The influence of the refrigerating capacity in design and control is analysis in this paper, a control method to raise the running economy is suggested.
本文分析了制冷量在设计和控制各环节中的影响，给出了一种提高制冷器运行经济性的控制方法。
The traditional structural design, mostly uses the empirical design method, lacks of concrete analysis on the squeeze area, cannot achieve the anticipated effect.
传统的结构设计，大多采用经验设计的方法，缺少对压榨区的具体的分析，不能达到预期的效果。
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