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公开(公告)号：US2713625A
公开(公告)日：1955-07-19
申请号：US35179853
申请日：1953-04-29
Applicant: WESTON ELECTRICAL INSTR CORP
Inventor： JOHNSON ROBERT W , KEBBON EARL R
IPC: G01N27/12
CPC classification number: G01N27/121
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