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发明名称
Train-dispatching system for railroads
摘要
申请公布号
US1794541(A)
申请公布日期
1931.03.03
申请号
US19290394240
申请日期
1929.09.21
申请人
GENERAL RAILWAY SIGNAL COMPANY
发明人
PHINNEY ROBERT M.
分类号
B61L21/06
主分类号
B61L21/06
代理机构
代理人
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地址
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