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发明名称
摘要
申请公布号	SU443149(A1)	申请公布日期	1974.09.15
申请号	SU19721794952	申请日期	1972.06.12
申请人		发明人
分类号	E02F9/02;(IPC1-7):E02F9/02	主分类号	E02F9/02
代理机构		代理人
主权项
地址

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