<prompt> Cherechedza ndima iri pasi apa uye wozopindura mubvunzo pashure mumutauro mumwe chete sezvinoita ndima: Passage: The chaiko nhamba 525 mitsetse akasarudzwa somugumisiro zvairambidzwa ari Vacuum-chubhu anotsanangura michina zuva. In okutanga TV hurongwa, tenzi voltage-inodzorwa oscillator akanga kumhanya kaviri chinjikira mutsetse kakawanda, uye kakawanda ichi rakakamurwa pasi ne nhamba mitsetse akashandiswa muchiitiko ichi 525 kupa munda kakawanda 60 Hz muchiitiko ichi. kakawanda ichi ipapo akaenzanisa pamwe 60 Hz simba-mutsetse kakawanda uye chero kusawirirana akaruramiswa nokugadzirisa kakawanda tenzi oscillator. Nokuti interlaced kushanda pakuvheneka, imwe nhamba mitsetse por furemu yaidiwa kuitira kuti wehunyambiri retrace kure zvakafanana nokuda dzisina uye dzisina minda, izvo kunyange zvaireva tenzi oscillator kakawanda aifanira kupatsanurwa pasi ne nhamba dzisina. Mubvunzo: How many lines was it?  <response>: Makumi mashanu nemashanu 