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经营范围
发明名称
Centralized traffic controlling system for railroads
摘要
申请公布号
US2082180(A)
申请公布日期
1937.06.01
申请号
US19340711175
申请日期
1934.02.14
申请人
GENERAL RAILWAY SIGNAL COMPANY
发明人
POWELL WINFRED T.
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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