
Testing Of Metallic Materials - Rockwell Hardness Test - Part 3: Modified Rockwell Scales Bm And Fm For Thin Steel Sheet
出版:German Institute for Standardisation (Deutsches Institut für Normung)

專家解讀視頻
Testing Of Metallic Materials - Rockwell Hardness Test - Part 3: Modified Rockwell Scales Bm And Fm For Thin Steel Sheet
出版:German Institute for Standardisation (Deutsches Institut für Normung)
專家解讀視頻