Use: Test the flatness of plate, leveling ruler, machine tool working platform, guides and precision work-piece.

用途：检测平板、平尺、机床工作台、导轨和精密工件的平面度、直线度。

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In practical application, plane measuring instrument is mainly used to test flatness of workpiece in micro level, so that people can check if the workpiece is qualified or not.

在实际应用中，平面测试仪主要用于工件的微米级测试，从而检验工件是否合格。

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