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发明名称
Электромагнитный телефон
摘要
申请公布号
SU25970(A1)
申请公布日期
1932.04.30
申请号
SU19300065085
申请日期
1930.02.24
申请人
ROZHANOVSKIJ A.K.
发明人
ROZHANOVSKIJ A.K.
分类号
H04R9/02
主分类号
H04R9/02
代理机构
代理人
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