单项选择题
A.Ⅰ级钢筋 B.热轧Ⅱ、Ⅲ级钢筋 C.碳素钢丝、刻痕钢丝、钢绞线和热处理钢筋 D.乙级冷拔低碳钢丝
A.60mm B.80mm C.100mm D.120mm
A.100mm B.150mm C.200mm D.250mm