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公开(公告)号：US3548242A
公开(公告)日：1970-12-15
申请号：US3548242D
申请日：1967-05-16
Applicant: SYLVANIA ELECTRIC PROD
Inventor： AYOTTE RONALD D , FORTIN CONRAD M , WALDO CRAIG T
IPC: H01J61/073 , H01J1/14 , H01J17/06 , H01J17/20
CPC classification number: H01J61/0732
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