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发明名称
Filtering process
摘要
申请公布号
US2470202(A)
申请公布日期
1949.05.17
申请号
US19470742725
申请日期
1947.04.19
申请人
LEONARD WICKENDEN
发明人
WICKENDEN LEONARD
分类号
C13B20/12
主分类号
C13B20/12
代理机构
代理人
主权项
地址
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