
BS EN 4500-5. Aerospace series. Metallic materials. Rules for drafting and presentation of material standards. Part 5. Specific rules for steels
出版:British Standards Institution

专家解读视频
BS EN 4500-5. Aerospace series. Metallic materials. Rules for drafting and presentation of material standards. Part 5. Specific rules for steels
出版:British Standards Institution
专家解读视频