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经营范围
发明名称
Centralized traffic controlling system
摘要
申请公布号
US2125499(A)
申请公布日期
1938.08.02
申请号
US19310576547
申请日期
1931.11.21
申请人
GENERAL RAILWAY SIGNAL COMPANY
发明人
HAILES WILLIAM D.
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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