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经营范围
发明名称
Rail joint
摘要
申请公布号
US1838821(A)
申请公布日期
1931.12.29
申请号
US19300488009
申请日期
1930.10.11
申请人
FRANKLIN NED G
发明人
FRANKLIN NED G.
分类号
E01B11/10
主分类号
E01B11/10
代理机构
代理人
主权项
地址
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