本文研究了管子钳活动钳口断裂现象。
The fracture of follower tongs holder of pipe pliers is analyzed.
结果表明，断裂是由于热处理工艺不当、管子钳活动钳口齿部、螺纹部以及螺纹和齿部的过渡连接部分硬度过高引起；
The results show that the fracture may be due to improper heat treatment which leads to over hardness of the thread part and the joint of thread part and tooth part.
所述钳口组件包括在分隔位置与接近位置之间可活动的第一及第二钳口部。
The jaw assembly includes first and second jaw portions movable between a spaced-apart and an approximated position.
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