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公开(公告)号:US2634394A
公开(公告)日:1953-04-07
申请号:US26754652
申请日:1952-01-22
Applicant: ASEA AB
Inventor: ANDERS KOHLER
IPC: G05F1/32 , G05F1/33
CPC classification number: G05F1/32 , G05F1/33