1. When the connection is broken, unlatch tongs and unscrew the pipe using chain tongs or pipe spinner. 卸开扣后，打开大钳用链钳或旋扣器旋开扣。
2. When the connection is broken, unlatch tongs and unscrew the pipe using chain tongs or pipe spinner. 卸开扣后，打开大钳用链钳或旋扣器旋开扣。
3. The series of power tongs are opening tongs, which are used for quickly make-up﹠break-out in well service operations. 本系列液压动力钳为开口型动力钳，配备液压背钳。
4. When the connection is broken, unlatch tongs and unscrew the pipe using chain tongs or pipe spinner. 卸开扣后，打开大钳用链钳或旋扣器旋开扣。
5. When finished, the Floormen remove the pull lines from the tongs and hang the tongs (tie back) at the side of the rig floor. 当接完单根后，钻工移开猫头绳，并将大钳移到或拴牢到钻台的旁边。
