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发明名称
摘要
申请公布号
DE2160644(B2)
申请公布日期
1979.08.02
申请号
DE19712160644
申请日期
1971.12.07
申请人
GEWERKSCHAFT EISENHUETTE WESTFALIA, 4670 LUENEN
发明人
HALLER, HERBERT, 4660 GELSENKIRCHEN;MENNEKES, WERNER, 4670 LUENEN
分类号
E21C27/06;E21C27/00;E21C31/04;(IPC1-7):E21D9/10
主分类号
E21C27/06
代理机构
代理人
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