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公开(公告)号：US3400354A
公开(公告)日：1968-09-03
申请号：US60427866
申请日：1966-12-23
Applicant: MATSUSHITA ELECTRONICS CORP
Inventor： TATSUO KAWASAKI , HIROMASA HASEGAWA
IPC: G01R33/07
CPC classification number: G01R33/07
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