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发明名称
Granular material classieier or purifier
摘要
申请公布号
US2331850(A)
申请公布日期
1943.10.12
申请号
US19400367477
申请日期
1940.11.27
申请人
SMITH WILLIAM N
发明人
SMITH WILLIAM N.
分类号
B07B7/08
主分类号
B07B7/08
代理机构
代理人
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