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发明名称
Supervisory system
摘要
申请公布号
US1743711(A)
申请公布日期
1930.01.14
申请号
US19250070514
申请日期
1925.11.21
申请人
BELL TELEPHONE LABORATORIES, INCORPORATED
发明人
FIELD JOSEPH C.
分类号
H02J13/00
主分类号
H02J13/00
代理机构
代理人
主权项
地址
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