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公开(公告)号：US2677778A
公开(公告)日：1954-05-04
申请号：US27954452
申请日：1952-03-31
Applicant: ATOMIC ENERGY COMMISSION
Inventor： BAKER WILLIAM R , VANCE DAVID A
IPC: H01J1/28
CPC classification number: H01J1/28
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