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公开(公告)号：US3450692A
公开(公告)日：1969-06-17
申请号：US3450692D
申请日：1965-02-05
Applicant: KEEVER CO
Inventor： HYLDON ROY G , FINK DORIS E , ABOUL-SAAD HALIM G
CPC classification number: C08B31/18
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