Yuav ua li cas kom ntse hniav nrog cov ntaub ntawv?

Vim li cas thiaj siv cov ntaub ntawv kom ntse riam?

Riam ntaub ntawv sharpening phau ntawv qhia:

Kauj Ruam 1 - Khaws rab riam hauv lub Vise

Kauj Ruam 2 - Siv lub kaum sab xis me me

Kauj ruam 3 - Rov qab Hniav ntaub ntawv

Kauj Ruam 4 - Tshem tawm cov ntawv ci

Kauj Ruam 5 - Rov ua dua li qhov xav tau

Yuav ua li cas sharpen ib tug ax nrog ib cov ntaub ntawv?

Kauj Ruam 1 - Khaws lub Axe hauv Vise

Kauj ruam 2 - Semi-circular ntaub ntawv

Kauj Ruam 3 - Rov ua dua li qhov xav tau