
Welding; all-weld metal test assembly for the classification of corrosion-resisting chromium and chromium-nickel steel covered arc welding electrodes
出版:International Organization for Standardization

專家解讀視頻
Welding; all-weld metal test assembly for the classification of corrosion-resisting chromium and chromium-nickel steel covered arc welding electrodes
出版:International Organization for Standardization
專家解讀視頻