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发明名称
TRAIN DESCRIBER SYSTEM
摘要
申请公布号
CA379420(A)
申请公布日期
1939.02.07
申请号
CAD379420
申请日期
申请人
GENERAL RAILWAY SIGNAL COMPANY
发明人
NEIL D. PRESTON
分类号
主分类号
代理机构
代理人
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