单词universal chuck
na.: 【机】自动卡盘网络: 万能卡盘;万能夹头;自动定心卡盘
【机械工程】自动卡盘
万能卡盘
The independent chuck has four jaws , while the universal chuck has only three .
分动卡盘有四个爪,而万能卡盘只有三个。