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发明名称
Dispositif pour l'indication automatique des sièges libres dans les sailes de cinéma et analogues
摘要
申请公布号
FR1104795(A)
申请公布日期
1955.11.24
申请号
FRD1104795
申请日期
1954.04.03
申请人
发明人
FANTUZZI
分类号
G08B5/22
主分类号
G08B5/22
代理机构
代理人
主权项
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