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发明名称
Railway traffic controlling apparatus
摘要
申请公布号
US2069905(A)
申请公布日期
1937.02.09
申请号
US19350042215
申请日期
1935.09.26
申请人
THE UNION SWITCH & SIGNAL COMPANY
发明人
THOMPSON HOWARD A.
分类号
B61L23/16
主分类号
B61L23/16
代理机构
代理人
主权项
地址
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