
HEAT-TREATABLE STEELS, ALLOY STEELS AND FREE-CUTTING STEELS - PART 1: NON ALLOY STEELS FOR QUENCHING AND TEMPERING (ISO 683-1:2016)
出版:German Institute for Standardisation (Deutsches Institut für Normung)

專家解讀視頻
HEAT-TREATABLE STEELS, ALLOY STEELS AND FREE-CUTTING STEELS - PART 1: NON ALLOY STEELS FOR QUENCHING AND TEMPERING (ISO 683-1:2016)
出版:German Institute for Standardisation (Deutsches Institut für Normung)
專家解讀視頻