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发明名称
Light out protection for railway signaling systems
摘要
申请公布号
US2526429(A)
申请公布日期
1950.10.17
申请号
US19480000296
申请日期
1948.01.02
申请人
THE UNION SWITCH & SIGNAL COMPANY
发明人
STAPLES CRAWFORD E.
分类号
B61L5/18
主分类号
B61L5/18
代理机构
代理人
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地址
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