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发明名称
Railway switch
摘要
申请公布号
US2502149(A)
申请公布日期
1950.03.28
申请号
US19450624850
申请日期
1945.10.26
申请人
HAGEMAN ADAM W
发明人
HAGEMAN ADAM W.
分类号
A63H19/32
主分类号
A63H19/32
代理机构
代理人
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