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发明名称
CAPTADOR-AMPLIFICADOR TELEFONICO PERFECCIONADO.
摘要
申请公布号
ES213221(Y)
申请公布日期
1977.07.16
申请号
ES19210002132U
申请日期
1975.06.17
申请人
发明人
分类号
H04M;(IPC1-7):04M/
主分类号
H04M
代理机构
代理人
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