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发明名称
EXPLORADOR FOTOELECTRICO PARA TELEFONISTAS CIEGAS.
摘要
申请公布号
ES362381(A1)
申请公布日期
1970.12.01
申请号
ES19810003623
申请日期
1969.01.11
申请人
STANDARD ELECTRICA, S. A.
发明人
分类号
H04M;(IPC1-7):04M/
主分类号
H04M
代理机构
代理人
主权项
地址
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