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发明名称
Frequency controlling system
摘要
申请公布号
US2239436(A)
申请公布日期
1941.04.22
申请号
US19380204812
申请日期
1938.04.28
申请人
GENERAL ELECTRIC COMPANY
发明人
ALEXANDERSON ERNST F. W.
分类号
H02P9/42
主分类号
H02P9/42
代理机构
代理人
主权项
地址
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