结构钢，碳钢，低合金钢，鉄素体和马氏体不锈钢。

Structural steels, Carbon content. Low-alloy steels. Ferritic and martensitic stainless steels.

youdao

结构钢，碳钢，低合金钢，鉄素体和马氏体不锈钢。

Structural steels, Carbon content. Low-alloy steels. Ferritic and martensitic stainless steels.

youdao