
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)

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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)
专家解读视频