《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___%。( )(单选题)
A.0.27%,0.27% B.0.27%,0.4% C.0.4%,0.27% D.0.4%,0.4%正确答案B
《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___%。( )(单选题)
A.0.27%,0.27% B.0.27%,0.4% C.0.4%,0.27% D.0.4%,0.4%正确答案B