管扳手，管钳：有两个锯齿形的钳牙，一个可调节以抓起或扳动管道。
A wrench with two serrated jaws, one adjustable, for gripping and turning pipe.
本发明令弯管扳手具有复位转动功效，以达到更快速的轮胎锁、卸作业。
The ratchet type bent pipe wrench with repositioning rotation function is applied for fast tyre assembling and disassembling operation.
使用钳子或管扳手拧紧螺栓或螺帽。这样可能会刮伤螺栓头或螺帽，从而形成尖锐的边缘。
Using pliers or a pipe wrench to tighten a bolt or nut. This may scar the bolt head or nut creating a sharp edge.
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