A.0.5~1圈,0.5~2圈 B.0.5~2圈,0.5~1圈 C.0.5~1圈,0.5~1圈 D.0.5~2圈,0.5~2圈
A.6mm,4mm B.5mm,3mm C.6mm,3mm D.7mm,3mm
A.2mm,3mm B.3mm,2mm C.4mm,2mm D.2mm,4mm