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发明名称
RAILWAY TRAFFIC SYSTEM
摘要
申请公布号
CA336136(A)
申请公布日期
1933.10.03
申请号
CAD336136
申请日期
申请人
THE GENERAL RAILWAY SIGNAL COMPANY
发明人
CARL F. STOLTZ;WILMER WELSH
分类号
主分类号
代理机构
代理人
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