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发明名称
Railway-car classification system
摘要
申请公布号
US1744011(A)
申请公布日期
1930.01.14
申请号
US19270222617
申请日期
1927.09.28
申请人
GENERAL RAILWAY SIGNAL COMPANY
发明人
PRESCOTT CHARLES W.
分类号
B61B1/00
主分类号
B61B1/00
代理机构
代理人
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地址
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