单项选择题
A.1500_4500mm B.1000_4500mm C.1500_3500mm
A.266mm B.180mm C.270mm
A.173mm B.180mm C.270mm
A.顶头、轧辊 B.顶头、轧辊、芯棒 C.顶头、轧辊、导板
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