“Q420E”簡單造句，Q420E造句子

1、In this paper the Submerged Arc Welding procedures for Q420E butt joint of Songhua River Stayed-cable Bridge were investigated.

2、結果表明，通過奧氏體未再結晶區變形量的調整，鋼板強度可以達到Q390E和Q420E級別。