单项选择题
A.0.02cm B.0.01cm C.0.02mm D.0.03cm
A.0.01mm B.0.02mm C.0.03mm D.0.04mm
A.0.02mm B.0.2mm C.0.2cm D.0.02cm
A.±3% B.±30% C.±4% D.±40%
微信扫一扫,加关注免费搜题
