(1) Kev kho ua ntej tshem tawm cov kab mob, oxide nplai, vuam slag, thiab lwm yam impurities los ntawm cov phab ntsa sab hauv ntawm cov yeeb nkab steel. Nws kuj smooths lub puab nto ntawm cov yeeb nkab steel thiab txo qhov kev ntxhov siab sab hauv. Qhov no ua tau zoo txhim khu kev pabcuam lub neej ntawm cov yeeb nkab steel, txo qis hauv corrosion, thiab yog li txhim kho ob qho tib si sab hauv thiab sab nraud zoo ntawm cov yeeb nkab steel.
(2) Tsis tas li ntawd, kev kho ua ntej ua rau kom muaj kev sib txhuam ntawm cov yeeb nkab hlau thiab cov yas hauv ob sab phlu, yog li ua kom muaj zog sib txuas.
