单项选择题
A.RR1、RR1_1 B.1RR2、1RR3
A.±0.02mm B.±0.03mm C.±0.13mm D.±10%
A.80% B.85% C.90% D.95%
A.≥25mil B.≥30mil C.≥40mil D.≥50mil
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