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发明名称
Perfectionnements aux appareils de projection
摘要
申请公布号
FR843178(A)
申请公布日期
1939.06.27
申请号
FRD843178
申请日期
1938.09.08
申请人
COMPAGNIE FRANCAISE POUR L'EXPLOITATION DES PROCEDES THOMSON-HOUSTON
发明人
分类号
G03B21/20
主分类号
G03B21/20
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