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公开(公告)号：US2881115A
公开(公告)日：1959-04-07
申请号：US43230454
申请日：1954-05-21
Applicant: STALEY MFG CO A E
Inventor： WINSTON LIGGETT ROBERT , MUSSULMAN WAYNE C , RENTSHLER DELMAR F , JACK ZIFFER
IPC: C12N9/34
CPC classification number: C12N9/2428 , Y10S435/913
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