Kusvina yakakwira pipe muchina yakanakira kune ese marudzi emapipi kutemwa, kupopotedzana uye kuguma kugadzirira. Iyo inopatsanura chimiro chinobvumira iyo muchina wekukamura muhafu pafuro uye mugomo uchitenderedza dhizaini yeiyo-mutsara pombi kana mafungidziro akasimba, akagadzikana. Midziyo inoita kuti isimbe mu-mutsara yakatemwa kana panguva imwe chete, Inoshanda kune akawanda zvinhu uye madziro kukakavara neyakasiyana simba pack.
