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摘要
申请公布号
US2975903(A)
申请公布日期
1961.03.21
申请号
US19570693700
申请日期
1957.10.31
申请人
PROCESS FILTERS, INC.
发明人
ULRICH EDWARD A.
分类号
B01D29/00
主分类号
B01D29/00
代理机构
代理人
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