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公开(公告)号：US3004668A
公开(公告)日：1961-10-17
申请号：US633960
申请日：1960-01-29
Applicant: PFAUDLER PERMUTIT INC
Inventor： ADAMS RALPH C
CPC classification number: E03B11/00 , B01D24/14 , B01D24/4631
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