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How to consider the roughness of chrome plated rod

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The roughness of the chromium plated rod is mainly related to the precision grinding, polishing and electroplating process of the optical axis. If the roughness of the optical axis is too high before chrome plating, it is very bad, because chrome plating will enlarge the defect, the roughness will increase exponentially after chrome plating, and the high roughness of chrome plating rod will accelerate its wear or damage and shorten its service life.