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公开(公告)号：US3318649A
公开(公告)日：1967-05-09
申请号：US31620663
申请日：1963-10-11
Applicant: KING LAB INC
Inventor： KELLER JR DOUGLAS V , SCOTT FREDERICK P
CPC classification number: H01J9/395 , H01J17/49 , H01J2893/0069
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