Sei mabhureki emotokari achiva "nyoro"?
Mushure mekutenga mota itsva yemakumi ezviuru zvemakiromita, varidzi vazhinji vanonzwa zvakati siyanei nemota nyowani pavanenge vabhureki, uye vanogona kunge vasina kunzwa kwekutsika nekumira pekutanga, uye kutsika bhureki pedal vanonzwawo. tsoka inonzwa "yakapfava". Chii chiri chikonzero cheizvi? Vamwe vatyairi vane ruzivo rwokuzviwanira vanoziva kuti imhaka yokuti mafuta ebhureki ari mumvura, zvichiita kuti bhureke rinzwe rakapfava, sokutsika donje.