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发明名称
Perforated feed rolls with induced gas flow therethrough
摘要
申请公布号
US3342093(A)
申请公布日期
1967.09.19
申请号
US19640412432
申请日期
1964.11.19
申请人
E. I. DU PONT DE NEMOURS AND COMPANY
发明人
BILLINGSLEY JOHN GEORGE SELBY
分类号
B02C23/16
主分类号
B02C23/16
代理机构
代理人
主权项
地址
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