Hot-rolled Broad Flanged I-beams (wide-flanged I-beams) With Parallel Flange Facings; Permissible Deviations
出版:European Committee for Iron & Steel Standardization
专家解读视频
Hot-rolled Broad Flanged I-beams (wide-flanged I-beams) With Parallel Flange Facings; Permissible Deviations
出版:European Committee for Iron & Steel Standardization
专家解读视频