Cha`o ca? nha`. To^i co' ngu+o+`i ba.n o+? Viet nam -dang ca^`n mo^t. so^' ta`i lie^.u ve^` CO^NG NGHE^. LASER, u+'ng du.ng laser trong ky? thua^.t (che^' ta.o, gia co^ng ....), va` laser trong y ho.c. Nha` ta ai bie^'t o+? -da^u co' xin ma'ch giu`m to^i vo+'i. Ne^'u la` tre^n WEB thi` to^'t. Ra^'t ca?m o+n. Ngo.c Ha^n --------------------------------------------------