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发明名称
Improved filtering apparatus and method
摘要
申请公布号
US2053628(A)
申请公布日期
1936.09.08
申请号
US19330701682
申请日期
1933.12.09
申请人
WILLIAM PATERSON
发明人
PATERSON WILLIAM
分类号
主分类号
代理机构
代理人
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