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发明名称
摘要
申请公布号
DE2504967(C3)
申请公布日期
1978.12.14
申请号
DE19752504967
申请日期
1975.02.06
申请人
GEWERKSCHAFT EISENHUETTE WESTFALIA, 4670 LUENEN
发明人
BARGEL, GUENTHER;HUESEMANN, HEINZ
分类号
E21D9/06;E21B7/20;(IPC1-7):E01G4/00;E02D17/146
主分类号
E21D9/06
代理机构
代理人
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