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发明名称
摘要
申请公布号	FR2184733(A1)	申请公布日期	1973.12.28
申请号	FR19730017136	申请日期	1973.05.11
申请人	BOCHUMER EISENHUTTE HEINTZMANN,DT	发明人
分类号	E21D19/02;E21D23/04;(IPC1-7):E21D19/02	主分类号	E21D19/02
代理机构		代理人
主权项
地址

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