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

本仪器是一种采用量块或件与试件相比较测量物体外形尺寸仪器。

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

本仪器是一般是用器（如量块）以比较法测量工件尺寸。