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公开(公告)号：US3116819A
公开(公告)日：1964-01-07
申请号：US21016862
申请日：1962-07-16
Applicant: GEN ELECTRIC
Inventor： LEROY KATZ
IPC: H01J9/46
CPC classification number: H01J9/46 , H01J2893/0096 , H01J2893/0097 , Y10S198/953
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