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公开(公告)号：US3428769A
公开(公告)日：1969-02-18
申请号：US3428769D
申请日：1966-07-26
Applicant: MC DONNELL DOUGLAS CORP
Inventor： CISZEWSKI JOSEPH F , HAYASE MASASHI , ROBINSON NORMAN F
CPC classification number: B23K1/002
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