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发明名称
Substation signalling device
摘要
申请公布号
US2951910(A)
申请公布日期
1960.09.06
申请号
US19580710563
申请日期
1958.01.22
申请人
NORTH ELECTRIC COMPANY
发明人
BAUMAN EDWARD E.
分类号
H04M19/04
主分类号
H04M19/04
代理机构
代理人
主权项
地址
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