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公开(公告)号：US3497546A
公开(公告)日：1970-02-24
申请号：US3497546D
申请日：1966-11-28
Applicant: LITTLE INC A
Inventor： LEVINS PHILIP L , JOHNSON DENNIS E , KRANICH WILMER L
IPC: C07C69/38 , C07C121/22 , C07C121/02
CPC classification number: C07C255/00
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