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发明名称
Improvements in and relating to focusing devices for photographic copying apparatus
摘要
申请公布号
GB435652(A)
申请公布日期
1935.09.25
申请号
GB19340030533
申请日期
1934.10.24
申请人
DAVID PAUL SHULL
发明人
分类号
G03B27/32
主分类号
G03B27/32
代理机构
代理人
主权项
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