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发明名称
Punching die for rail anchors
摘要
申请公布号
US1969514(A)
申请公布日期
1934.08.07
申请号
US19290398133
申请日期
1929.10.08
申请人
BETHLEHEM STEEL COMPANY
发明人
LEHMAN EDGAR R.
分类号
B21D28/14
主分类号
B21D28/14
代理机构
代理人
主权项
地址
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