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经营范围
发明名称
Railway rail
摘要
申请公布号
US1972262(A)
申请公布日期
1934.09.04
申请号
US19320605183
申请日期
1932.04.14
申请人
DUDLEY FISH GILBERT
发明人
FISH GILBERT DUDLEY
分类号
E01B31/18
主分类号
E01B31/18
代理机构
代理人
主权项
地址
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