单项选择题
A.0.3-0.5mm B.0.5-1mm C.0.5-3mm D.9.5-50.8mm
A.φ9.5mm B.φ12.7mm C.φ22.2mm D.φ28mm
A.φ9.5mm B.φ12.7mm C.φ16mm D.φ28mm