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Priority to JP1557882UpriorityCriticalpatent/JPS58119136U/ja
Publication of JPS58119136UpublicationCriticalpatent/JPS58119136U/ja
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Publication of JPS6221877Y2publicationCriticalpatent/JPS6221877Y2/ja
Automatisk signalekvaliseringskrets for aa tilveiebringe en optimalisert likestroem til ett eller flere telefonapparater uavhengig av abonnentsloeyfens lengde