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DIN EN 2139:1989-10 Aerospace; washers, flat, heat resisting steel; german version EN 2139:1989

标准编号:DIN EN 2139:1989-10

英文标题:Aerospace; washers, flat, heat resisting steel; german version EN 2139:1989

德文标题:Luft- und Raumfahrt; Scheiben aus hochwarmfestem Stahl; Deutsche Fassung EN 2139:1989

发布日期:1989-10

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