Preheating e bolela ts'ebetso e futhumatsang licheso ka botlalo kapa libakeng tsa weld pele ho cheselletsa. Haholo-holo thepa e ntle bakeng sa ho cheseletsa matla a phahameng, tšekamelo e thata ea tšepe, conductivity ea mocheso, litšepe tse kholoanyane, 'me ha mocheso o le tlase haholo, sebaka sa ho cheselletsa hangata se hloka ...
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