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公开(公告)号：US3505559A
公开(公告)日：1970-04-07
申请号：US3505559D
申请日：1968-09-25
Applicant: NORTHROP CORP
Inventor： JEFFRIES LESTER A , LANDRUM BOBBY L , QUINN ROBERT J
CPC classification number: H01J29/467 , H01J29/023 , H01J31/128
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