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发明名称
Railroad track circuit
摘要
申请公布号
US2985752(A)
申请公布日期
1961.05.23
申请号
US19590784967
申请日期
1959.01.05
申请人
FRED FINES;WHARTON ROBERT O
发明人
FINES FRED;WHARTON ROBERT O.
分类号
B61L1/18
主分类号
B61L1/18
代理机构
代理人
主权项
地址
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