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发明名称
Railway traffic controlling apparatus
摘要
申请公布号
US2352298(A)
申请公布日期
1944.06.27
申请号
US19410411161
申请日期
1941.09.17
申请人
THE UNION SWITCH & SIGNAL COMPANY
发明人
WALLACE HERBERT A.
分类号
B61L23/22
主分类号
B61L23/22
代理机构
代理人
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地址
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