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发明名称
Train-dispatching system for railroads
摘要
申请公布号
US1794563(A)
申请公布日期
1931.03.03
申请号
US19290371091
申请日期
1929.06.15
申请人
GENERAL RAILWAY SIGNAL COMPANY
发明人
WENHOLZ WALTER W.
分类号
B61L7/08
主分类号
B61L7/08
代理机构
代理人
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地址
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