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发明名称
Automatic signaling system for railways
摘要
申请公布号
US2083290(A)
申请公布日期
1937.06.08
申请号
US19350019734
申请日期
1935.05.03
申请人
THE UNION SWITCH & SIGNAL COMPANY
发明人
CAILLE GEORGE
分类号
B61L1/18
主分类号
B61L1/18
代理机构
代理人
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地址
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