red and blue bright leds on a black background. close-up of an advertising screen in times squares, manhattan, new york state, united states. natural light and colors. - 液晶體顯示器 個照片及圖片檔
the fiber laser cutting machine cutting the sheet metal plate with the sparking light. hi-technology manufacturing concept. - 液晶體顯示器 個照片及圖片檔