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公开(公告)号：US2940123A
公开(公告)日：1960-06-14
申请号：US74842758
申请日：1958-07-14
Applicant: BASF AG
Inventor： HANS BECK , JOSEF WAHLANDT
CPC classification number: B29C45/1735 , B29C45/231 , Y10S264/78
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