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发明名称
Track circuit for railroads
摘要
申请公布号
US2210242(A)
申请公布日期
1940.08.06
申请号
US19390253836
申请日期
1939.01.31
申请人
GENERAL RAILWAY SIGNAL COMPANY
发明人
HOPPE ALICE MAIJGREN
分类号
B61L1/18
主分类号
B61L1/18
代理机构
代理人
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地址
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