My old artificial hand had a pretty basic open-close mechanism similar to a clamp.

我的旧假手有一个非常基本的开关装置，类似于夹钳。

youdao

The enterprise mainly manufactures bolt cutters, pipe wrenches, captive hand tools most other pipeline products, including pipe clamp production scale ranks first in the country counterparts.

企业主要生产断线钳、管子钳、掳手极其它管道工具的系列产品，其中管子钳生产规模居全国同行之首位。

youdao

And you will clamp your hand over your mouth because you laughed and that laugh will break your heart, it will feel like a betrayal.

WSJ: Augusten Burroughs on How to Live Unhappily Ever After