Wood laser marking machines for sale 1.Mark on wood,plastic flat & ... power:1PRefrigeration unit:De-ionized water, distilled water or purified water.Feature:1. Diode pumped laser marking ... distort.3. Can quickly mark letter, figure, graphics or auto-coding, serial No., batch No., barcode, 2 ... -D code, etc. on metal or nonmetal surface (plastic, silicon or porcelain, etc.) which are precise, permanent, ...