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公开(公告)号：US2934081A
公开(公告)日：1960-04-26
申请号：US66340157
申请日：1957-06-04
Applicant: HAROLD CORBETT THOMAS
Inventor： HAROLD CORBETT THOMAS
CPC classification number: B01J4/02 , A01C23/042 , B01F5/0403 , Y10T137/2564
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