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发明名称
摘要
申请公布号	GB1256933(A)	申请公布日期	1971.12.15
申请号	GBD1256933	申请日期	1969.04.02
申请人		发明人
分类号	G02B6/44;H01B7/04;H01B13/02	主分类号	G02B6/44
代理机构		代理人
主权项
地址

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