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1.发明授权
公开(公告)号：US2697200A
公开(公告)日：1954-12-14
申请号：US26780252
申请日：1952-01-23
Applicant: CUTLER HAMMER INC
Inventor： BALL HUGH E , ERIC PELL
IPC: B23K11/24
CPC classification number: B23K11/24 , Y10T307/43
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