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经营范围
发明名称
Metallic railroad tie
摘要
申请公布号
US2386100(A)
申请公布日期
1945.10.02
申请号
US19430488152
申请日期
1943.05.24
申请人
EZELL AUGUSTUS L
发明人
EZELL AUGUSTUS L.
分类号
E01B3/20
主分类号
E01B3/20
代理机构
代理人
主权项
地址
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