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发明名称
ELECTRIC RELAY
摘要
申请公布号
CA348039(A)
申请公布日期
1935.02.05
申请号
CAD348039
申请日期
申请人
THE GENERAL RAILWAY SIGNAL COMPANY
发明人
JOSEPH F. MERKEL
分类号
主分类号
代理机构
代理人
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地址
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