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公开(公告)号：US2987377A
公开(公告)日：1961-06-06
申请号：US61335356
申请日：1956-10-01
Applicant: OLIN MATHIESON
Inventor： FAUST JOHN P , GOODSPEED NEIL C
CPC classification number: C01B6/00 , C01B35/026
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