
Aerospace series - Metallic materials Part 001: Conventional designation; German and English version EN 2032-001:2014
出版:German Institute for Standardisation (Deutsches Institut für Normung)

專家解讀視頻
Aerospace series - Metallic materials Part 001: Conventional designation; German and English version EN 2032-001:2014
出版:German Institute for Standardisation (Deutsches Institut für Normung)
專家解讀視頻