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发明名称
SYMMETRICAL ZOOM LENS SYSTEM
摘要
申请公布号
GB2088081(A)
申请公布日期
1982.06.03
申请号
GB19810031127
申请日期
1981.10.15
申请人
CANON KK
发明人
分类号
G03B27/34;G02B15/16;(IPC1-7):G02B15/14
主分类号
G03B27/34
代理机构
代理人
主权项
地址
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