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发明名称
Coded track circuit system involving highway crossing signal control
摘要
申请公布号
US2512343(A)
申请公布日期
1950.06.20
申请号
US19460655635
申请日期
1946.03.19
申请人
THE UNION SWITCH & SIGNAL COMPANY
发明人
LAURENSON ROBERT M.
分类号
B61L29/28
主分类号
B61L29/28
代理机构
代理人
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地址
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