The main causes is analysed for looseness of the threaded connection on pumping unit crank pin and the corresponding preventive measures are proposed.
文章介绍了多种螺纹联接的预紧力控制方法和防松措施，从多方面针对性的阐述了解决螺纹联接质量的方法。
The main causes is analysed for looseness of the threaded connection on pumping unit crank pin and the corresponding preventive measures are proposed.
文章介绍了多种螺纹联接的预紧力控制方法和防松措施，从多方面针对性的阐述了解决螺纹联接质量的方法。
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