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发明名称
Фонический коммутатор
摘要
申请公布号
SU33577(A1)
申请公布日期
1933.12.31
申请号
SU19290054448
申请日期
1929.09.05
申请人
RATMAN I.M.
发明人
RATMAN I.M.
分类号
H04Q5/00
主分类号
H04Q5/00
代理机构
代理人
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地址
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