... Build-in computer data processing and LCD: adopting highly integrated micro digital circuit, which is stable and reliable with the functions of ... adopted to eliminate color difference in full range. By means of chemical conversion, a round light spot of the light source becomes ... Totally automatic): Making the characteristic concentration of As, Se, Sb, Bi, Pb, Sn, Te, Ge, In, Tl, Cd and Zn lower than ...