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发明名称
Control machine panel for switch and signal control systems
摘要
申请公布号
US2507921(A)
申请公布日期
1950.05.16
申请号
US19480029704
申请日期
1948.05.28
申请人
GENERAL RAILWAY SIGNAL COMPANY
发明人
MERKEL JOSEPH F.
分类号
B61L25/08
主分类号
B61L25/08
代理机构
代理人
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地址
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