单项选择题
A.130mm B.135mm C.100mm D.133mm
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
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