Izinga lokushisa lokukhipha umoya lingelinye lamapharamitha abalulekile; Izinga lokushisa lokujiya liyipharamitha ebalulekile yokusebenza emjikelezweni wesiqandisi; Izinga lokushisa le-compressor casing kanye nezinga lokushisa lasembonini yimingcele ebalulekile edinga ukunakwa okukhethekile. Lezi zinhlaka zokusebenza zibalulekile ukuthuthukisa ukusebenza kahle nokusebenza kukonke.