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发明名称
Микрофон
摘要
申请公布号
SU20696(A1)
申请公布日期
1931.05.31
申请号
SU19300068396
申请日期
1930.04.15
申请人
VERESHSHAK L.M.
发明人
VERESHSHAK L.M.
分类号
H04R21/02
主分类号
H04R21/02
代理机构
代理人
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