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发明名称
摘要
申请公布号	FR2450940(B1)	申请公布日期	1983.05.20
申请号	FR19800003034	申请日期	1980.02.12
申请人	EISENHUTTE WESTFALIA GEWERKSCHAF	发明人
分类号	E21C27/32;E21C35/12;(IPC1-7):E21C35/12;E21C27/34;E21C29/14	主分类号	E21C27/32
代理机构		代理人
主权项
地址

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