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公开(公告)号：CA1010144A
公开(公告)日：1977-05-10
申请号：CA196990
申请日：1974-04-08
Applicant: VARIAN ASSOCIATES
Inventor： NELSON RICHARD B , LIEN ERLING L , MIRAM GEORGE V
IPC: H01J23/087 , H01J23/065
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