中文谷Q420E造句怎么写
- 造句
- 关注：1.04W次
2、结果表明，通过奥氏体未再结晶区变形量的调整，钢板强度可以达到Q390E和Q420E级别。
1、In this paper the Submerged Arc Welding procedures for Q420E butt joint of Songhua River Stayed-cable Bridge were investigated.
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