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。
2
Huff, clamp the mestus of bag when put the windpipe into it, then huff to open up the fully to bottom in order to avoid the material overflow from the bag if the it is not opened fully.
吞吐，夹袋道时，把气管进入它，然后气呼呼地打开全下以避免袋溢料如果它不是完全打开。
3
Special style for bursting disc surrounding open bolt hole flange to clamp style. With the method of manufacturing agreement.