cup dolly(夹卡筒形工件用)

例句：

1. 1. The machine tool used for making cupsand dollies is very precise.
   用于制作杯子和娃娃的机床非常精确。
2. 2.The engineer designed a new type of cupdolly to improve the efficiency of theproduction line.
   工程师设计了一种新型的杯形夹具，以提高生产线的效率。
3. 3. Thecup dolly was used to hold thefragile glass pieces during the assembly process.
   杯形夹具在组装过程中用于固定易碎的玻璃片。