单项选择题
A.±0.01mm B.±0.02mm C.±0.03mm D.±0.04mm
A.0.1N B.0.2N C.0.4N D.0.6N
A.0.01mm B.0.02mm C.0.03mm D.0.04mm
A.0.1 B.0.2 C.0.3 D.0.4
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