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发明名称
Устройство для приема электрических сигналов постоянного направления
摘要
申请公布号
SU27962(A1)
申请公布日期
1932.10.31
申请号
SU19310098659
申请日期
1931.11.30
申请人
GRUZDEV A.R.
发明人
GRUZDEV A.R.
分类号
H03C1/62
主分类号
H03C1/62
代理机构
代理人
主权项
地址
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