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发明名称
Усилитель слабых постоянных токов
摘要
申请公布号
SU63309(A1)
申请公布日期
1943.11.30
申请号
SU19400348929
申请日期
1940.09.21
申请人
NIKIFOROV A.K.
发明人
NIKIFOROV A.K.
分类号
主分类号
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