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公开(公告)号：US3481255A
公开(公告)日：1969-12-02
申请号：US3481255D
申请日：1967-04-21
Applicant: BASF AG
Inventor： ERDMANN KURT , NERLICH LYDIA , FISCHER CLAUS , FRIEDENREICH HEINRICH , BAUER HELMUT
CPC classification number: F04B37/12 , F04B39/0005 , F05C2201/0448
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