
Aluminium and aluminium alloys - Extruded rod/bar, tube and profiles Part 9: Profiles, tolerances on dimensions and form; English version of DIN EN 755-9
出版:German Institute for Standardisation (Deutsches Institut für Normung)

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Aluminium and aluminium alloys - Extruded rod/bar, tube and profiles Part 9: Profiles, tolerances on dimensions and form; English version of DIN EN 755-9
出版:German Institute for Standardisation (Deutsches Institut für Normung)
专家解读视频