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发明名称
IMPROVEMENTS IN AND RELATING TO OPTICAL ARRANGEMENTS
摘要
申请公布号
GB1244342(A)
申请公布日期
1971.08.25
申请号
GB19680043156
申请日期
1968.09.11
申请人
KABUSHIKI KAISHA RICOH
发明人
分类号
G02B27/00;G02B27/09;G03B15/00
主分类号
G02B27/00
代理机构
代理人
主权项
地址
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