index plate

• 分度盘,刻度板

index plate的用法和样例：

例句

1. For the larger ball valves, as well as all butterfly valves, the appropriate butterfly valve handle and index plate are supplied for manual operation of the stem extensions.
   对于更大的球阀，以及所有蝶阀，可提供适当的蝶阀手柄和刻度板，用于阀杆加长件的手动操作。