单项选择题
A.±3.0mm B.±3.5mm C.±4.0mm D.±5.5mm
A.±5mm B.±3mm C.±4mm D.±6mm
A.±3mm B.±6mm C.±9mm D.±12mm
A.±1.0mm B.±2.0mm C.±3.0mm D.±4.0mm
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