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发明名称
Electric train signaling system
摘要
申请公布号
US2019166(A)
申请公布日期
1935.10.29
申请号
US19340711788
申请日期
1934.02.17
申请人
THE UNION SWITCH & SIGNAL COMPANY
发明人
WHITELOCK LELAND D.
分类号
H04B3/60
主分类号
H04B3/60
代理机构
代理人
主权项
地址
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