有效地控制钢轨连续闪光焊的动力柱送进速度，可以使整个焊接过程保持连续和稳定的闪光，从而获得优良的焊接接头。

Flash can be continual and steady, and then, the good welding joints could be obtained by properly controlling feeding speed of shifting unit of rail continuous flash welding.

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在拧卸钻杆时为了保护动力头钻杆接头，防止其磨损，通常的做法是在该接头处联接一个保护接头。

A protecting joint is added at power head rod joint in order to prevent power head rod joint abrasion when rod is screwed or unscrewed.

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挠性接头是动力调谐陀螺的关键元件，刚度是其重要指标。

The flexible joint is the key component of dynamically tuned gyro (DTG), and its rigidity is a very important parameter.

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