
Hot rolled steel channels Part 1: Taper flange steel channels - Dimensions, masses and sectional properties
出版:German Institute for Standardisation (Deutsches Institut für Normung)

專家解讀視頻
Hot rolled steel channels Part 1: Taper flange steel channels - Dimensions, masses and sectional properties
出版:German Institute for Standardisation (Deutsches Institut für Normung)
專家解讀視頻