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发明名称
Railway track circuit-signalling system
摘要
申请公布号
US2887570(A)
申请公布日期
1959.05.19
申请号
US19550530593
申请日期
1955.08.25
申请人
PIERRE LEROY EMILE MARCEL
发明人
LEROY EMILE MARCEL PIERRE
分类号
B61L1/18;B61L23/16
主分类号
B61L1/18
代理机构
代理人
主权项
地址
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