Kev siv lub kaum sab xis grinder:
1/ Hloov cov sib tsoo log sib txawv kom ua tau raws li qhov sib txawvhlau sib tsoo, txiav thiab xeb tshem tawm.
2/ Nrog lub pob zeb txiav disc, nws tuaj yeem ua cov vuas, pob zeb, thiab tseem tuaj yeem txiav ntoo me me thiab nyias ntoo (zoo dua siv cov saw me me los nruab rau ntawm lub kaum sab xis kom txiav ntoo).
3/ Hloov mus rau lub log nrov plig plawg, polishing log tuaj yeem siv rau polishing hlau. Nws tsis haum rau polishing ntoo (nws pom zoo kom yuav lub tshuab siv)
