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发明名称
Adjustable screen for hammer mills
摘要
申请公布号
US2258537(A)
申请公布日期
1941.10.07
申请号
US19400371745
申请日期
1940.12.26
申请人
LIZZIE M. HUGHES
发明人
CALKINS HERBERT B.
分类号
B02C13/284
主分类号
B02C13/284
代理机构
代理人
主权项
地址
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