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经营范围
发明名称
Rail retaining structure
摘要
申请公布号
US2626108(A)
申请公布日期
1953.01.20
申请号
US19490072521
申请日期
1949.01.24
申请人
LEE SPENCER
发明人
SPENCER LEE
分类号
E01B9/40
主分类号
E01B9/40
代理机构
代理人
主权项
地址
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