GB/T 34560.2-2017结构钢第2部分:一般用途结构钢交货技术条件国家标准
英文:Structural steels—Part 2: Technical delivery conditions for structural steels for general purposes GB/T 34560.2-2017介...
英文:Structural steels—Part 2: Technical delivery conditions for structural steels for general purposes GB/T 34560.2-2017介...