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针对目前抽油机在修井作业时,驴头传统的紧固形式存在的问题,设计了一种双凸轮锁紧式结构,具有操作方便、锁紧可靠、功效显著的特点。
Aimed at the problems existing in the traditional fastening form of donkey head during well workover, a double cam locking structure is designed, which has the characteristics of easy operation, reliable locking and remarkable effect.