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经营范围
发明名称
Rail joint
摘要
申请公布号
US1937075(A)
申请公布日期
1933.11.28
申请号
US19320618729
申请日期
1932.06.22
申请人
ALBERT J. VAN ENKEVORT
发明人
WALKER LEMUEL J.
分类号
E01B11/24
主分类号
E01B11/24
代理机构
代理人
主权项
地址
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