Chingwe chachitsulo chopangidwa ndi chitsulo chimakhala ndi makhalidwe omwe si ophweka kuti achite dzimbiri, oyenerera kumangidwe kwapamwamba, kuyendetsa galimoto ndi sitima zapamadzi, ntchito za Marine, traction, bundling ndi madera ena, makamaka m'makampani osodza omwe amagwiritsidwa ntchito kawirikawiri. Kutha kwa chingwe chachitsulo chachitsulo ndi chachikulu, chosavuta kuthyoka, chotetezeka komanso chodalirika.