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.

对管子钳钳口的锻模进行了分析改进，将整体式锻模改为拼装式锻模。

The forging die of adjustable pliers has been analysed and improved from integral die to inserted type die which is convenient in striking and assembling and its pack-age is easy to be changed.

表头钳钳口的前端是一个斜刃，可挂住电缆接线卡的管壁端口，以测量其握裹力。

The front end of the nip of the gauge head pliers is an oblique blade which can hang the pipe wall port of the cable connection clamp for measuring the holding force.

把卡压工具钳口的环状凹部对准管件端部内装有橡胶圈的环状凸部进行卡压。

Align the ring-form concave of pressing jaw with the rim on press-fitting, in groove of which a rubber ring is mounted, and compress it bv pressing tools.

断管采用钢锯或无齿锯，需断切的管子尺寸准确，将管子置于压力钳口中心卡紧，断口平齐。

Broken pipes adopt a hacksaw or a saw without teeth. The size of pipe needing to cut should be exact. Put pipes on the center of pressure jaw, and keep fractures even.