Raws li peb txhua tus paub, qhov xaus ntawm lub iav hlab yog ib txwm ntxhib thiab tsis sib xws tom qab txiav. Nyob rau lub sijhawm no, peb tuaj yeem hlawv qhov xaus ntawm lub khob raj, uas yog, hlawv nws nrog cov nplaim taws ntawm lub khob kom ua tiav thaum nws softens. Peb tuaj yeem xaiv ibRaj tej tshuab nrog ib tug hlawv muaj nuj nqilossis muab nws nrog ib qho ntxiv raj kawg polishing tshuab.
Lub tshuab muaj peev xwm xaiv cov lus qhia sib txawv thiab ntev ntawm lub khob raj rau tag nrho rau polishing, thiab tuaj yeem txhuam ob qho tag nrho lossis txhua qhov kawg. Yog tias koj tsuas yog xav tau Polish ib kawg, koj tuaj yeem kaw lub valve ntawm lwm qhov kawg. Tus qauv tsim yog qhov yooj yim heev thiab tsim nyog.
