单项选择题
A.150mm B.160mm C.170mm D.180mm
A.126mm B.126mm+1mm C.126mm+4mm D.12mm+5mm
A.1t～12t B.1t～50t C.8t～96t D.10t～100t
A.25Km/h B.30Km/h C.40Km/h D.45Km/h
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