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发明名称
TRAIN TRAFFIC CONTROL
摘要
申请公布号
CA483695(A)
申请公布日期
1952.06.03
申请号
CAD483695
申请日期
申请人
HARRY W. RICHARDS
发明人
HARRY W. RICHARDS
分类号
主分类号
代理机构
代理人
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地址
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