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发明名称
Signaling system for railroads
摘要
申请公布号
US2049404(A)
申请公布日期
1936.07.28
申请号
US19320608507
申请日期
1932.04.30
申请人
GENERAL RAILWAY SIGNAL COMPANY
发明人
BENNETT JERRY
分类号
B61L23/16
主分类号
B61L23/16
代理机构
代理人
主权项
地址
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