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

本仪器是用量块或标准零件与试件相比较的方式测量物体寸的仪器。

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

本仪器是般是用标准器（如量块）以比较法测量工件的寸。