The optimeter is widely used to precisely measure external size ofworkpiece by comparison with a gauge block or standard part.

本仪器是一量块或标准零件与试件相比较的方式测量物尺寸的仪器。

The optimeter is widely used to precisely measure external size of workpiece by comparison with a gauge block or standard part.

本仪器是一般是标准器（如量块）以比较法测量工件的尺寸。