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发明名称
DEVICE FOR MONITORING TRAINING OF TELEGRAPH OPERATORS
摘要
申请公布号
SU1539818(A1)
申请公布日期
1990.01.30
申请号
SU19874184773
申请日期
1987.01.20
申请人
KUDRYASHOV NIKOLAJ,SU;POPENKO VLADIMIR S,SU
发明人
KUDRYASHOV NIKOLAJ I,SU;POPENKO VLADIMIR S,SU
分类号
G09B7/00
主分类号
G09B7/00
代理机构
代理人
主权项
地址
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