Patent search ap:("ASEA AB") AND inv:"HAMMARLUND PER ERIK" Page 1

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发明授权
Channel type furnace for vacuum 失效
Title translation: 通道式真空炉

公开(公告)号：US3551578A

公开(公告)日：1970-12-29

申请号：US3551578D

申请日：1969-08-07

Applicant: ASEA AB

Inventor： HAMMARLUND PER ERIK , FREDRIKSON BENGT

IPC: H05B6/20 , H05B6/34

CPC classification number: H05B6/20 , H05B6/34

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