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发明名称
Railway switch
摘要
申请公布号
US1825415(A)
申请公布日期
1931.09.29
申请号
US19310532757
申请日期
1931.04.25
申请人
OVERMILLER ROY A
发明人
OVERMILLER ROY A.
分类号
E01B7/08
主分类号
E01B7/08
代理机构
代理人
主权项
地址
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