PEGW mndandanda wa lm mayendedwe amtundu amatanthawuza mipira yotsika ya flange ya mtundu wa kalozera, S imatanthawuza katundu wapakatikati ndipo C amatanthauza kuchuluka kolemetsa, A kumatanthauza kuyika bawuti kuchokera pamwamba.Low kukangana liniya wotsetsereka opangidwa ndi mizere inayi zitsulo mipira mu arc groove dongosolo amene ali mkulu katundu mphamvu mbali zonse, mkulu okhwima, kudzikonda aligning, akhoza kuchepetsa unsembe cholakwika cha okwera pamwamba, otsika mikangano liniya mayendedwe chimagwiritsidwa ntchito zida zazing'ono.