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发明名称
Method of making wire-drawing dies
摘要
申请公布号
US2216652(A)
申请公布日期
1940.10.01
申请号
US19360085422
申请日期
1936.06.15
申请人
HARTFORD NATIONAL BANK AND TRUST COMPANY
发明人
ROMP JOHAN
分类号
B21C3/18
主分类号
B21C3/18
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代理人
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