单项选择题
A.φ30 B.+0.005 C.-0.005 D.φ29.995
A.12 B.0.025 C.0.015 D.0.010
A.φ2.0 B.φ2.4 C.φ2.02 D.φ1.62
A.φ1.5mm B.φ2.0mm C.φ1.62mm D.φ2.02mm
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