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发明名称
Highway crossing signaling system
摘要
申请公布号
US2106683(A)
申请公布日期
1938.01.25
申请号
US19360066233
申请日期
1936.02.28
申请人
GENERAL RAILWAY SIGNAL COMPANY
发明人
WILLING JOSEPH E.
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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