A.磨削 B.熱處理 C.鍍鉻 D.冷壓校直
A.0.2-0.7mm B.0.3~0.8mm C.0.4-0.9mm D.0.5-1mm
A.0.2~0.4mm B.0.1~0.3mm C.0.3~0.5mm D.0.4~0.6mm