
Aerospace series - Metallic materials - Rules for drafting and presentation of material standards Part 001: General rules; German and English version EN 4500-001:2012
出版:German Institute for Standardisation (Deutsches Institut für Normung)

專家解讀視頻
Aerospace series - Metallic materials - Rules for drafting and presentation of material standards Part 001: General rules; German and English version EN 4500-001:2012
出版:German Institute for Standardisation (Deutsches Institut für Normung)
專家解讀視頻