Chitoliro chosapanga dzimbiri ndi mtundu wa dzenje yaitali kuzungulira zitsulo chubu, amene zimagwiritsa ntchito mapaipi mafakitale mayendedwe monga mafuta, makampani mankhwala, mankhwala, chakudya, makampani kuwala, makina chida, etc., komanso zigawo structural makina.