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发明名称
COMMUNICATION SYSTEM
摘要
申请公布号
CA464502(A)
申请公布日期
1950.04.18
申请号
CAD464502
申请日期
申请人
GENERAL RAILWAY SIGNAL COMPANY
发明人
NEIL D. PRESTON;FOREST B. HITCHCOCK
分类号
主分类号
代理机构
代理人
主权项
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