标题: DIN 1690_Rev 1991 [打印本页] 作者: nable123 时间: 2020-11-7 22:04:45 标题: DIN 1690_Rev 1991
Technical delivery conditions for castings of metallic materials supplementary requirements for steel castings used for heavy-duty vales
金属材料铸件交货技术条件重型阀门用钢铸件补充要求[attach]235894[/attach]