单项选择题
A.磨削 B.热处理 C.镀铬 D.冷压校直
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
A.0.1 mm B.0.15mm C.0.2mm D.0.25mm
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