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公开(公告)号:US3218476A
公开(公告)日:1965-11-16
申请号:US27153663
申请日:1963-02-21
Applicant: ASEA AB
Inventor: LENNART HANSSON
IPC: H02M1/088 , H02M7/155 , H02M7/162 , H02M7/17 , H02M7/19
CPC classification number: H02M7/17 , H02M1/088 , H02M7/155 , H02M7/1626 , H02M7/19