a pipe wrench used for turning large pipes; an adjustable chain circles the pipe with its ends connected to the head whose teeth engage the pipe
chain tongs的用法和样例:
例句
The structure and working principle of the chain clamp, which can hold the worpieces and turn the workpieces through friction, are introduced. 介绍了一种可以抱紧工件并通过摩擦力拧转工作的链条钳的结构及工作原理。