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单项选择题
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
单项选择题
A.2mm,3mm
B.3mm,2mm
C.4mm,2mm
D.2mm,4mm
单项选择题
A.2mm,3mm
B.2.5mm,3mm
C.2mm,2.5mm
D.2mm,4mm
单项选择题
A.30mm,24mm
B.40mm,24mm
C.30mm,23mm
D.50mm,24mm