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公开(公告)号：US3378740A
公开(公告)日：1968-04-16
申请号：US36277664
申请日：1964-04-27
Applicant: PHILIPS CORP
Inventor： ROLF CRUEL
CPC classification number: H03J5/14 , G05D3/10 , G05D3/1409 , H02P7/05 , H03J1/00
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