1.Txhua yam ntawm cov khoom seem: Feem ntau ntawm cov khoom siv rau cutter, spreader thiab plotter peb muaj nyob rau hauv peb lub tsev rau khoom, tsuas yog qhia peb tus lej, peb tuaj yeem kuaj xyuas tus nqi rau koj.
2.Peb yuav ua kom zoo dua ntawm peb cov khoom thiab txo tus nqi, kom lav cov neeg siv khoom tus nqi txo 40% ~ 60%.
3. Kev xa khoom sai.Cov khoom yuav raug xa hauv 2 teev los ntawm kev nthuav qhia thoob ntiaj teb tom qab tau txais cov nyiaj them poob haujlwm.