
HOT-ROLLED PRODUCTS IN WELDABLE FINE GRAIN STRUCTURAL STEELS - PART 1: GENERAL DELIVERY CONDITIONS
出版:German Institute for Standardisation (Deutsches Institut für Normung)

專家解讀視頻
HOT-ROLLED PRODUCTS IN WELDABLE FINE GRAIN STRUCTURAL STEELS - PART 1: GENERAL DELIVERY CONDITIONS
出版:German Institute for Standardisation (Deutsches Institut für Normung)
專家解讀視頻