A.10-6~10-7 B.0.01~0.1 C.1~10 D.10-9~10-10
A.0.01~0.04mm/r B.0.04~0.08mm/r C.0.08~0.12mm/r D.0.12~0.16mm/r
A.Ra1.6~0.8um B.Ra0.2~0.04um C.Ra0.4~0.2um D.Ra0.8~0.4um