... hypertrophied myocardium 肥厚性心肌病 driven well pump 钻井泵 absorber materials 吸波材料 ...
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surface driven screw pump well 地面驱动螺杆泵井
electric-driven deep-well cargo pump 电动货油深井泵
driven well pump
自动机泵
以上为机器翻译结果，长、整句建议使用 人工翻译 。
In the light of the frequent breaking of the rod string in a surface driven screw pump well, the force condition of the string in the well is analyzed by means of the elastoplasticity theory.
针对井口驱动螺杆泵抽油杆柱断脱频繁的问题，应用弹塑性理论分析了抽油杆柱在井中的受力状况。
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