A.≤1mm,1.5mm≤长度≤3mm B.≤0.5mm,1.5mm≤长度≤3mm C.≤3mm,1.5mm≤长度≤3mm
A.1-3mm,≤2个 B.1-4mm,1个 C.2-3mm,2个 D.1-2mm,3个
A.1mm≤直径≤3mm B.1mm≤直径≤1.5mm C.1mm≤直径≤2mm D.0.5mm≤直径≤1.5mm