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发明名称
Perfectionnements apportés à la fabrication et confection d'écrans pour projections lumineuses
摘要
申请公布号
FR1107924(A)
申请公布日期
1956.01.06
申请号
FRD1107924
申请日期
1954.06.14
申请人
发明人
BALLU EMILE-VICTOR-LOUIS
分类号
G03B21/56
主分类号
G03B21/56
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代理人
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