... to 200 self-defined items16.Keyboard: membrane keyboard17.Display: 10.4” color LCD18.Printer: built-in thermal printer, paper width ... -control system, sample-filling system, printer, microcomputer system, color LCD, keyboard.Features:(1) Plane holographic diffraction grating as ... auto printing, auto memory, auto wavelength change, real-time display.(5) testing method: Linear end point,non-linear end ...