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发明名称
Highway crossing signal system
摘要
申请公布号
US2128203(A)
申请公布日期
1938.08.23
申请号
US19360110867
申请日期
1936.11.14
申请人
GENERAL RAILWAY SIGNAL COMPANY
发明人
DORSCHEL CYRIL H.
分类号
B61L29/28
主分类号
B61L29/28
代理机构
代理人
主权项
地址
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