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发明名称
摘要
申请公布号	GB1238791(A)	申请公布日期	1971.07.07
申请号	GBD1238791	申请日期	1969.01.23
申请人		发明人
分类号	E02F3/413	主分类号	E02F3/413
代理机构		代理人
主权项
地址

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