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公开(公告)号：US3437886A
公开(公告)日：1969-04-08
申请号：US3437886D
申请日：1966-03-24
Applicant: ASEA AB
Inventor： EDQVIST OLLE , SVEDBERG PER , VEDIN BENGT-ARNE
CPC classification number: H01L29/0661 , H01L29/00
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