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发明名称
摘要
申请公布号	DE2821248(C3)	申请公布日期	1981.09.24
申请号	DE19782821248	申请日期	1978.05.16
申请人	BECK, DIETER, 2110 BUCHHOLZ, DE	发明人	GUERGEN, KARLHEINZ, 2110 BUCHHOLZ, DE
分类号	E21B10/40;E21B10/44;E21B10/58;(IPC1-7):E21B10/26;E21B10/36	主分类号	E21B10/40
代理机构		代理人
主权项
地址

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