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经营范围
发明名称
écran pour projections lumineuses en plein jour ou en salle éclairée
摘要
申请公布号
FR720706(A)
申请公布日期
1932.02.23
申请号
FRD720706
申请日期
1930.08.06
申请人
发明人
CREUZET ROBERT
分类号
G03B21/62
主分类号
G03B21/62
代理机构
代理人
主权项
地址
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