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发明名称
Screening and purifying machine
摘要
申请公布号
US2217710(A)
申请公布日期
1940.10.15
申请号
US19380233668
申请日期
1938.10.06
申请人
JENNIE M. SHALER
发明人
SHALER DAVID M.
分类号
B02B1/02
主分类号
B02B1/02
代理机构
代理人
主权项
地址
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