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发明名称
Railway terminal communicating system
摘要
申请公布号
US2021855(A)
申请公布日期
1935.11.19
申请号
US19320613676
申请日期
1932.05.26
申请人
GENERAL RAILWAY SIGNAL COMPANY
发明人
DRAKE CALCB;LANGDON ANDREW
分类号
B61L1/20
主分类号
B61L1/20
代理机构
代理人
主权项
地址
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Package
