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1.发明授权
公开(公告)号：US3416218A
公开(公告)日：1968-12-17
申请号：US39931064
申请日：1964-09-25
Applicant: NORTH AMERICAN ROCKWELL
Inventor： ARMENOFF CARL T , REED EDWARD L
IPC: B23K20/00
CPC classification number: B23K20/00 , B23K2201/02
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