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发明名称
Compte-fils lumineux
摘要
申请公布号
FR1047808(A)
申请公布日期
1953.12.17
申请号
FRD1047808
申请日期
1951.06.13
申请人
发明人
PIZON PIERRE-MAURICE
分类号
G02B25/02
主分类号
G02B25/02
代理机构
代理人
主权项
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