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经营范围
发明名称
Improvements in or relating to optical apparatus
摘要
申请公布号
GB637854(A)
申请公布日期
1950.05.31
申请号
GB19460009673
申请日期
1946.03.28
申请人
PIERRE SORDOILLET
发明人
分类号
G02B21/00
主分类号
G02B21/00
代理机构
代理人
主权项
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