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nable123
发表于 2020-11-7 22:04:45
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
admin
发表于 2020-11-16 08:43:41
谢谢您的分享,金币已奖励!
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DIN 1690_Rev 1991