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公开(公告)号：US3508883A
公开(公告)日：1970-04-28
申请号：US3508883D
申请日：1967-10-30
Applicant: DOW CHEMICAL CO
Inventor： GATTO DAVID M , COX KENNETH E
CPC classification number: B01J3/03 , F16J15/40 , Y10S277/91
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