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公开(公告)号：US3418509A
公开(公告)日：1968-12-24
申请号：US55612866
申请日：1966-06-08
Applicant: PHILIPS CORP
Inventor： MARI FROUWS SIMON , GEORGE KERR , MARIA HENDRIKS ADRIANUS ANTHON
IPC: H01J17/49
CPC classification number: H01J17/491
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