... system 3.Diode pump laser 4.CNC control Laser marking machine SampleTechnical parameters Input voltage:AC220V±20VFrequency:50HzInput power:1. ... distilled water or purified water.·Feature:Diode pumped laser marking machine adopts high-quality semi-conductor module, life time over 10k ... to distort.Can quickly mark letter, figure, graphics or auto-coding, serial No., batch No., barcode, 2 -D code, etc. ...