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发明名称
Magnetic car retarder
摘要
申请公布号
US1818933(A)
申请公布日期
1931.08.11
申请号
US19280245142
申请日期
1928.01.07
申请人
GENERAL RAILWAY SIGNAL COMPANY
发明人
ROSS OSCAR A.
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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