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发明名称
摘要
申请公布号	DE2047454(A1)	申请公布日期	1972.04.06
申请号	DE19702047454	申请日期	1970.09.26
申请人		发明人
分类号	B26F3/00;E21B7/18;E21C25/60	主分类号	B26F3/00
代理机构		代理人
主权项
地址

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