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发明名称
Improvements in or relating to photographic objectives of the petzval type
摘要
申请公布号
GB754620(A)
申请公布日期
1956.08.08
申请号
GB19540025216
申请日期
1954.08.31
申请人
PAILLARD S.A.
发明人
分类号
G02B13/00
主分类号
G02B13/00
代理机构
代理人
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