单项选择题
A.50~130mm B.80~130mm C.135~185mm D.140~190mm
A.2450N B.3430N C.4410N D.5884N
A.45° B.60° C.90° D.180°
A.0.1~0.8mm B.0.2~0.8mm C.0.3~0.8mm D.0.4~0.8mm
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