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经营范围
发明名称
Rerailing frog
摘要
申请公布号
US2247581(A)
申请公布日期
1941.07.01
申请号
US19410378337
申请日期
1941.02.11
申请人
THE PENNSYLVANIA RAILROAD COMPANY
发明人
JONES LLOYD B.
分类号
B61K5/06
主分类号
B61K5/06
代理机构
代理人
主权项
地址
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