1. Measure the workpiece on site in the measurement room, and do the bottom measurement experiment. As a result, when the lens is pulled down, the OGP image will become blurred, which will affect the correct positioning, and the accurate measurement value cannot be obtained, so direct bottom measurement does not support the acquisition of correct data. 2. The measuring point is the position marked on the drawing. 3. The surface roughness collection data is updated in the following table, please check.
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