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发明名称
Устройство для подачи звукового сигнала
摘要
申请公布号
SU19098(A1)
申请公布日期
1931.01.31
申请号
SU19280026167K
申请日期
1928.04.05
申请人
BOTKOVSKIJ B.I.
发明人
BOTKOVSKIJ B.I.
分类号
G08B3/06
主分类号
G08B3/06
代理机构
代理人
主权项
地址
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