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发明名称
Угольный микрофон
摘要
申请公布号
SU43045(A1)
申请公布日期
1935.05.31
申请号
SU19340159082
申请日期
1934.12.16
申请人
KISELEV F.A.
发明人
KISELEV F.A.
分类号
H04R21/02
主分类号
H04R21/02
代理机构
代理人
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地址
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