Machubhu ekurongedza anoumbwa ane chubhu muviri wakagadzirwa kubva zana muzana bepa rakadzokororwa, rakanamwa nemapulagi epurasitiki, simbi plugs, kana simbi mhete uye plug friction kuvharwa.Machubhu anobata maziso anowedzera kukosha kune zvigadzirwa zvako, kuvandudza kuvepo kwesherufu uye kuwana kukwezva kwevatengi kwakanyanya.
Iyo simbi plug yekupedzisira ndeyekudya-giredhi-yakatemerwa kupera kwekuvhara iyo inokodzera snugly mukati mepakeji, ichipa yakasimba friction fit.Iyo inodzokororwa simbi plug inoshanda kudzosera pasuru mushure mekushandisa kwega kwega uye haidi yekuwedzera michina post-kuzadza.Kana ichienzaniswa nedzimwe sarudzo dzekuvhara giredhi rekudya, iyo simbi plug inowanikwa mune zvidiki zvidiki, izvo zvinogona kubatsira kuderedza mutengo wekurongedza.