Kugwiritsa ntchito
Makinawa ndi oyenera kuwotcherera golide, siliva, titaniyamu, faifi tambala, malata, mkuwa, zotayidwa ndi zitsulo zina ndi aloyi zinthu zake, akhoza kukwaniritsa chimodzimodzi kuwotcherera mwatsatanetsatane pakati zitsulo ndi zitsulo zosiyana, wakhala ankagwiritsa ntchito muzamlengalenga zida, shipbuilding, zida, zida zamakina ndi zamagetsi, zamagalimoto ndi mafakitale ena.
