Iimveliso eziphambili zizo zonke iintlobo zokucaciswa kwetyhubhu yangaphakathi ye-butyl kunye nemathiriyeli ekrwada, kubandakanya ityhubhu yangaphakathi yelori, ityhubhu yangaphakathi yabakhweli, itayara, ityhubhu yangaphakathi yesithuthuthu kunye netyhubhu yangaphakathi yebhayisekile yombane, kwaye iyakwamkela ukwenza ityhubhu yangaphakathi emile ngokukodwa.Ubume, ukwakhiwa kunye noyilo lweemveliso zethu ziye zavavanywa ngokobunzululwazi kwangoko.Zineenzuzo ezininzi, ezifana nokusebenza kakuhle kokhuseleko, umthamo ophezulu wokuthwala, ukuchasana nokuguga okunamandla kunye nobomi benkonzo ende, ukubonelela abasebenzisi ngezisombululo ezahlukeneyo zamatayara.