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公开(公告)号：US3258570A
公开(公告)日：1966-06-28
申请号：US35029564
申请日：1964-03-09
Applicant: ASEA AB
Inventor： GUSTAV SINDAHL KARL , SVEN AKERVALL
IPC: H01H33/00
CPC classification number: H01H33/008
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