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经营范围
发明名称
Rail joint
摘要
申请公布号
US1952573(A)
申请公布日期
1934.03.27
申请号
US19310512868
申请日期
1931.02.02
申请人
YOUNG CHARLES D
发明人
YOUNG CHARLES D.
分类号
E01B11/02
主分类号
E01B11/02
代理机构
代理人
主权项
地址
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