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发明名称
Ring-roll crusher
摘要
申请公布号
US2220153(A)
申请公布日期
1940.11.05
申请号
US19370182085
申请日期
1937.12.28
申请人
E. I. DU PONT DE NEMOURS & COMPANY
发明人
HOGE PIERRE W.
分类号
B02C15/04;B02C15/16;B02C17/10
主分类号
B02C15/04
代理机构
代理人
主权项
地址
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