1.Mechanical polishing Mechanical polishing Mechanical polishing ndi njira yopukutira yomwe imachotsa magawo opukutidwa a convex mwa kudula ndi kusinthika kwa pulasitiki kwa zinthu zakuthupi kuti mupeze malo osalala.Nthawi zambiri, zingwe zamafuta, mawilo a ubweya, sandpaper, ndi zina zambiri zimagwiritsidwa ntchito, makamaka pamanja, ndi p...
Werengani zambiri