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发明名称
Rail joint
摘要
申请公布号
US2657863(A)
申请公布日期
1953.11.03
申请号
US19490088709
申请日期
1949.04.21
申请人
LEE BARRETT ARTHUR
发明人
BARRETT ARTHUR LEE
分类号
E01B11/44
主分类号
E01B11/44
代理机构
代理人
主权项
地址
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