试题详情

《游乐设施安全技术监察规程(试行)》规定:焊接结构需用可焊性好的钢材,普通碳素钢含碳量在___以下,低合金钢的碳当量应小于___%。()

A0.27%,0.27%

B0.27%,0.4%

C0.4%,0.27%

D0.4%,0.4%