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公开(公告)号：US3252473A
公开(公告)日：1966-05-24
申请号：US45355565
申请日：1965-04-26
Applicant: SMITH CORP A O
Inventor： ERICKSON CHARLES D , STANSELL JOEL L , STEPHEN STASENKO
CPC classification number: B01D19/0063 , F16K24/048 , G01F15/08 , Y10T137/3012 , Y10T137/3077
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