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经营范围
发明名称
Granular material classifier or purifier
摘要
申请公布号
GB549019(A)
申请公布日期
1942.11.03
申请号
GB19410005615
申请日期
1941.04.30
申请人
WILLIAM NEWELL SMITH
发明人
分类号
B07B4/02
主分类号
B07B4/02
代理机构
代理人
主权项
地址
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