单项选择题
A.1~1.5mm B.1.5~2mm C.2.5~3mm D.3~3.5mm
A.±0.5mm B.±1.5mm C.±2.0mm D.±2.5mm
A.50% B.100% C.150% D.200%
A.0.5mm B.1mm C.1.5mm D.2mm
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