Dongosololi ndi lotsogola muukadaulo, wotetezeka komanso wodalirika, wokhala ndi magwiridwe antchito apamwamba, ndikudyetsa ndikusintha ntchito.Chikho chonse choyamwa chimakhala ndi mbale yoyamwa, yomwe ili ndi zofunikira zochepa pa malo a bolodi, ndipo ndizofunikira makamaka pa bolodi lomwe limagwiritsidwa ntchito podula ndi thanzi pambuyo podula;Galimoto ya servo ndiyosavuta kumvetsetsa, njira yotsatsira imayendetsedwa, kubwerezabwereza kwa makina osuntha kumafika 16 / min, ntchitoyo imakhala yokhazikika, phokoso lochepa, mphamvu yowonongeka ndi yochepa, ndipo moyo wautumiki ndi wautali.