four-lipped cam

例句：

1. 1. This tool is used to hold together two pieces of metal together.
   这个工具用来将两块金属固定在一起。
2. 2.The four-lipped clamp was designed to be easy to use and secure the workpiece.
   这种四唇钳设计得易于使用，可以稳固地固定工件。
3. 3.In this case, the four-lipped clamp was used to hold the bolt in place while it was being tightened.
   在这种情况下，四唇钳被用来在螺栓被拧紧时固定住它。