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公开(公告)号：US2983433A
公开(公告)日：1961-05-09
申请号：US75259158
申请日：1958-08-01
Applicant: VARIAN ASSOCIATES
Inventor： LLOYD WILLIAM A , HUFFMAN GLEN A
IPC: H01J41/20
CPC classification number: H01J41/20
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