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发明名称
摘要
申请公布号	DE2101475(A1)	申请公布日期	1972.08.03
申请号	DE19712101475	申请日期	1971.01.14
申请人		发明人
分类号	E21D15/44;(IPC1-7):E21D/	主分类号	E21D15/44
代理机构		代理人
主权项
地址

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