Icyerekezo kinini gipfa guhimba bivuga guhimba bifite imiterere igoye, idafite burr, ishami rito ryinshi cyangwa hamwe na cavit, iboneka mugukoresha impfu zishyizwe hamwe, zimaze gushyuha hamwe no gukubita inshuro imwe.Byongeye kandi, haribisabwa cyane kuri tonnage yo gukanda imashini.Mubihe byashize, kubera ubunini bunini bwa diameter nini ihindura umubiri, irashobora gukorwa gusa mugabanye ifeza hanyuma igateranyirizwa hamwe ikanasudira hamwe.Niba hakoreshwa ibyerekezo byinshi bipfa gukoreshwa, ntabwo imiterere yonyine ishobora guhimbwa mubushuhe bumwe, ariko kandi umwobo wimbere urashobora guhurizwa hamwe, bikazamura cyane imbaraga nuburanga bwubusa mubyerekezo bya fibre, no kugabanya igiciro cyibicuruzwa. .