1, yuav ua rau cov hlau nyob rau hauv tuag castings tsis contiguous;
2, txo cov roj nruj ntawm lub workpiece;
3, tuag castings yooj yim rau corrosion;
4, txo lub zog ntawm tuag casting thiab yas;
5, tuag casting kab nrib pleb,;
6, tom qab ua haujlwm nyuaj dua;
7, tuag casting seem nce;
8, teeb meem impurities thiab kev tiv thaiv ib puag ncig tsis tuaj yeem dhau mus.
