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发明名称
Method of forming tie plates
摘要
申请公布号
US2306657(A)
申请公布日期
1942.12.29
申请号
US19380183010
申请日期
1938.01.03
申请人
THE P. & M. COMPANY
发明人
WILLARD GEORGE T.
分类号
B21D53/00
主分类号
B21D53/00
代理机构
代理人
主权项
地址
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