index crank

例句：

1. 1. The index crank on thescale is stuck.
   秤上的分度盘指针卡住了。
2. 2. The engineer used the pointerto adjust the dial.
   工程师用指针调整了分度盘。
3. 3. The dial was adjustedto the correct temperature setting.
   分度盘被调整到了正确的温度设置。