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发明名称
摘要
申请公布号	GB1256923(A)	申请公布日期	1971.12.15
申请号	GBD1256923	申请日期	1969.02.12
申请人		发明人
分类号	C04B2/08	主分类号	C04B2/08
代理机构		代理人
主权项
地址

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