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发明名称
Tie-plate
摘要
申请公布号
US1998043(A)
申请公布日期
1935.04.16
申请号
US19320599566
申请日期
1932.03.17
申请人
BOYD JAMES K;SLICK FRANK F
发明人
BOYD JAMES K.;SLICK FRANK F.
分类号
E01B9/48
主分类号
E01B9/48
代理机构
代理人
主权项
地址
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