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1.Roof structure of concrete blocks having wave-shaped passages containing stressed reinforcing 失效
标题翻译: 混凝土块的屋顶结构,其具有含有应力增强的波浪形通道公开(公告)号:US3319387A
公开(公告)日:1967-05-16
申请号:US38962964
申请日:1964-08-14
申请人: EDELTRAUD POLONYI , PAUL STEWING
发明人: ALBERT STEWING , STEFAN POLONYI