
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