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公开(公告)号：US3254152A
公开(公告)日：1966-05-31
申请号：US31684163
申请日：1963-10-17
Applicant: CONS VACUUM CORP
Inventor： FINNEY WILLIAM E , GAUGER ROY C , PERKINS EDWARD W
IPC: H01J41/04
CPC classification number: H01J41/04
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