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发明名称
Автоматический счетчик времени переговоров по телефону
摘要
申请公布号
SU31059(A1)
申请公布日期
1933.07.31
申请号
SU19300074288
申请日期
1930.08.14
申请人
SHABANOV P.E.
发明人
SHABANOV P.E.
分类号
H04M15/26
主分类号
H04M15/26
代理机构
代理人
主权项
地址
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