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公开(公告)号：US3395080A
公开(公告)日：1968-07-30
申请号：US51132965
申请日：1965-12-03
Applicant: AMERICAN HOME PROD
Inventor： GEORGE GREENSPAN , DAVID HARTLEY
IPC: C12P33/00
CPC classification number: C12P33/00 , Y10S435/933
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