Carton inoyerera racking, yakashongedzerwa ine diki yakarerekera roller, inobvumira katoni kuyerera kubva kumusoro kurodha kudivi kuenda kudivi rekudzoreredza.Inochengetedza nzvimbo yekuchengetera nekubvisa nzira dzekufamba uye inowedzera kumhanyisa kumhanya uye kugadzira.