Zirconium core, e sebelisetsoang nozzle ea tundish.
Litšobotsi tsa mantlha:
1. Ho hanyetsa ha kutu e ntle, ha ho na katoloso e hlakileng ea bophara, bophelo bo bolelele ba tšebeletso, ha ho phallo e khelohileng, ts'ebetso ea ho hasana;
2. Ts'ebetso ea mocheso oa mocheso o motle, ts'ebetso e khahlanong le ho phatloha e ntle haholo;