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发明名称
Signal lumineux à faisceau secondaire orientable
摘要
申请公布号
FR828135(A)
申请公布日期
1938.05.11
申请号
FRD828135
申请日期
1937.01.22
申请人
发明人
DAMOND EMILE
分类号
G02B3/08
主分类号
G02B3/08
代理机构
代理人
主权项
地址
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