BLUING / BLUE UP : Process of using blue dye to coat a surface of a master, gauge, or piece of product to check a flat, circular, or tapered surface.
着色检查：使用蓝色染料涂在模具，量规或者产品表面以检查平面、圆面或者锥面的工序。
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It is indicated that the precise flat Plate, hollow column and clock gauge should be selected properly to satisfy actual requirements for measuring accuracy of oil well pump liners.
HONIC 400 is not only recommended for cylinder honing on hard, soft and close-grained cast iron but also for flat honing and lapping operations on gauge blocks and gudgeon pins.