Kuchepetsa mumsewu 90 digiri chigongono chopangidwa ndi chitoliro chachitsulo chophatikizira ndi mipope, yomwe imagwiritsidwa ntchito polumikiza mapaipi awiri amitundu yosiyanasiyana pamakona a digirii 90, mbali imodzi yopangidwa kuti ikwane mkati mwa chitoliro chachikulu ndipo mbali inayo kuti ikwane pa chitoliro chaching'ono.Amagwiritsidwa ntchito popanga mapaipi, kutentha, ndi gasi kuwongolera mapaipi mozungulira zopinga, kusintha komwe akupita, kapena kusintha pakati pa kukula kwa mapaipi.Chitsulo chosungunuka chimapangitsa kuti chikhale cholimba komanso chosasunthika kusweka kapena kusweka ndi mphamvu.