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发明名称
Railway-traffic-controlling apparatus
摘要
申请公布号
US1770386(A)
申请公布日期
1930.07.15
申请号
US19290394792
申请日期
1929.09.24
申请人
THE UNION SWITCH & SIGNAL COMPANY
发明人
BAUGHMAN GEORGE W.
分类号
B61L3/22
主分类号
B61L3/22
代理机构
代理人
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地址
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