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发明名称
Railway signaling
摘要
申请公布号
US1859960(A)
申请公布日期
1932.05.24
申请号
US19310522245
申请日期
1931.03.13
申请人
THE UNION SWITCH & SIGNAL COMPANY
发明人
CRAGO PAUL H.
分类号
B61L13/04
主分类号
B61L13/04
代理机构
代理人
主权项
地址
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