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发明名称
Method of making composite billets
摘要
申请公布号
US2343771(A)
申请公布日期
1944.03.07
申请号
US19410418504
申请日期
1941.11.10
申请人
COPPERWELD STEEL COMPANY
发明人
HOLMQUIST CARL W.
分类号
B22D7/02
主分类号
B22D7/02
代理机构
代理人
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地址
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