Home › Blog › Buying Guide › What Do Buyers Look for Before Investing in a Pre-Owned, Used, Secondhand, Surplus CNC Equipment Before Purchase DANIPPON SCREEN RE-3100 Ellipsometric Film Thickness Measurement System Evaluating a pre-owned / used / surplus Dainippon Screen (or Dai Nippon / SCREEN) RE-3100 ellipsometric film thickness measurement system (or equivalent ellipsometer / film metrology instrument) is quite different from inspecting a CNC machine....