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公开(公告)号:US3072554A
公开(公告)日:1963-01-08
申请号:US1186760
申请日:1960-02-29
Applicant: ASEA AB
Inventor: MADSEN KRISTIAN D
IPC: G21C19/22 , G21C19/32
CPC classification number: G21C19/22 , G21C19/32