
STEEL FORGINGS FOR PRESSURE PURPOSES - PART 4: WELDABLE FINE GRAIN STEELS WITH HIGH PROOF STRENGTH
出版:German Institute for Standardisation (Deutsches Institut für Normung)

专家解读视频
STEEL FORGINGS FOR PRESSURE PURPOSES - PART 4: WELDABLE FINE GRAIN STEELS WITH HIGH PROOF STRENGTH
出版:German Institute for Standardisation (Deutsches Institut für Normung)
专家解读视频