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经营范围
发明名称
Centralized traffic control system for railroads
摘要
申请公布号
US3008041(A)
申请公布日期
1961.11.07
申请号
US19560579683
申请日期
1956.04.20
申请人
GENERAL RAILWAY SIGNAL COMPANY
发明人
SMITH WILLIS R.
分类号
B61L7/08
主分类号
B61L7/08
代理机构
代理人
主权项
地址
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