检定平板应合理支承当由三块平板互研或用标准宽面平尺研磨平板时，平板即便能得到理想的研磨斑点，但检定结果却并不一定能得到理想的平面度，而且检得的平面度往往较实际形状为凸，究其因：按检定所得的平板平面度值既有平板本身存在的实际平面度误差，又有因平板支承位... Test plate should be a reasonable support When the research by the three plate or flat with a standard flat face grinding plate, even if the plate can get the ideal grinding spots, but the test results do not necessarily get the desired flatness, and seized plane Degree is often more than the actual shape of the convex, because of its test results: flatness of the flat plate both the actual existence of the actual flatness error, but also because of flat support bit ...