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发明名称
Filter unit
摘要
申请公布号
US1792797(A)
申请公布日期
1931.02.17
申请号
US19280323307
申请日期
1928.12.03
申请人
ARMSTRONG JOHN J
发明人
ARMSTRONG JOHN J.
分类号
B01D25/12;B01D29/00;B01D33/00;B01D37/02
主分类号
B01D25/12
代理机构
代理人
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地址
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