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发明名称
écran pour projection
摘要
申请公布号
FR54627(E)
申请公布日期
1950.07.07
申请号
FRD54627
申请日期
1944.09.15
申请人
发明人
SAGET JULIEN
分类号
G03B21/60
主分类号
G03B21/60
代理机构
代理人
主权项
地址
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