... , artifical stone, tombstone, milestone, ceramic tile, jade, crystal, ceramics, glass, plastic, wood, bamboo, cambered surface, sphere, stainless steel, iron, copper, aluminium, titanium ... .Engraving characters, letters, pattern, intaglio, rilievi, handwriting, ancient calligraphy, abrazine colored drawing, flat carving colored drawing, etc on stone, glass, depth can ...