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发明名称
Tie-plate
摘要
申请公布号
US2051982(A)
申请公布日期
1936.08.25
申请号
US19330673513
申请日期
1933.05.29
申请人
BOYD JAMES K;SILCK FRANK F
发明人
BOYD JAMES K.;SILCK FRANK F.
分类号
E01B9/46
主分类号
E01B9/46
代理机构
代理人
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