1. 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标准零件与试件相比较的方式测量物体外形尺寸的仪器。
2. The optimeter is widely used to precisely measure external size of workpiece by comparison with a gauge block or standard part.
   本仪器是一般是用标准器（如量块）以比较法测量工件的尺寸。

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