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发明名称
Ringausbau fuer Schaechte, insbesondere Blindschaechte, Gesenke u. dgl. und Verfahren zu seiner Herstellung
摘要
申请公布号
DE919522(C)
申请公布日期
1954.10.25
申请号
DE1951H010632
申请日期
1951.12.04
申请人
FA. ALBERT HOFFMANN
发明人
ADAMS HANS;SIMONS WILHELM
分类号
E21D5/08
主分类号
E21D5/08
代理机构
代理人
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