Yog hais tias nws yog phau ntawv arc vuam, ua ntej ntawm tag nrho cov, xyuam xim rau qhov txawv molten hlau thiab txheej. Saib xyuas lub pas dej molten: cov kua ci ntsa iab yog molten hlau, thiab dab tsi ntab rau ntawm nws thiab ntws yog txheej. Thaum welding, xyuam xim kom tsis txhob cia lub txheej tshaj cov hlau molten, txwv tsis pub nws yooj yim ...
Nyeem ntxiv