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发明名称
Railway traffic controlling apparatus
摘要
申请公布号
US2061756(A)
申请公布日期
1936.11.24
申请号
US19350017978
申请日期
1935.04.24
申请人
THE UNION SWITCH & SIGNAL COMPANY
发明人
CRAGO PAUL H.;DODD ARTHUR E.
分类号
B61L21/06
主分类号
B61L21/06
代理机构
代理人
主权项
地址
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