automatic jigger

例句：

1. 1. The automatic jigger is used to hold the workpiece in place while it is being machined.
   自动夹具用于在加工过程中固定工件。
2. 2. The engineer used the automatic jigger to ensure that the parts were properlyaligned before they were assembled.
   工程师使用自动夹具确保零件正确对齐后进行组装。
3. 3. The automatic jigger wasdesigned to save time and reduce errors byautomatically adjusting the tension on the wire.
   自动夹具设计用来节省时间并减少错误，通过自动调整电线的张力。