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发明名称
Interlocking system for railroads
摘要
申请公布号
US2255142(A)
申请公布日期
1941.09.09
申请号
US19390295937
申请日期
1939.09.21
申请人
GENERAL RAILWAY SIGNAL COMPANY
发明人
WIGHT SEDGWICK N.
分类号
B61L19/06
主分类号
B61L19/06
代理机构
代理人
主权项
地址
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