Tlhaloso e Khutšoanyane:

Tlhaloso: The flap valve ke valve ea tsela e le 'ngoe e kentsoeng moo ho tsoang phala ea drainage letamong la noka. Qetellong ea phala ea drainage, ha khatello ea metsi e nyolohang holimo e le kholo ho feta khatello ea hydrostatic ea maqhubu a noka, valve ea flap e tla buleha. Ka lehlakoreng le leng, disc ea flap valve e tla koaloa ka bo eona ho thibela leqhubu la noka hore le se ke la tšollela phala ea drainage. Kopo: E loketse metsi a linōka, metsi a leoatle, baahi le likhoerekhoere tsa indasteri le joalo-joalo No. Name Mat...