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公开(公告)号：US3004211A
公开(公告)日：1961-10-10
申请号：US68993757
申请日：1957-10-14
Applicant: VARIAN ASSOCIATES
Inventor： ANDERSON WESTON A , MATHIAS JOHN M
IPC: G01R33/24
CPC classification number: G01R33/24
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