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发明名称
Railway car retarder
摘要
申请公布号
US1876014(A)
申请公布日期
1932.09.06
申请号
US19310560718
申请日期
1931.09.02
申请人
THE UNION SWITCH & SIGNAL COMPANY
发明人
LIVINGSTON JOHN W.
分类号
B61K7/12
主分类号
B61K7/12
代理机构
代理人
主权项
地址
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