单项选择题
A.YH-7 B.YH-8 C.YH-9 D.YH-10
A.1.1~1.3 B.1.0~1.3 C.1.1~1.4 D.1.1~1.5
A.4mm、3.5mm B.3.5mm、4mm C.3mm、4mm D.3mm、3.5mm
A.1mm B.1.5mm C.2mm D.2.5m
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