... 400liter/h7ml/h52×32×30(CM)37KG47This flame polishing machine electrolyze water into hydrogen, then we can use hydrogen ... to do polish, and welding. No pollution. Application:This machine especially used in Jewelry, Perspex, electronic, electrical machinery, motol ... fridge, cool air lamp, quarze processing, candle mould, tooth mould, gold, silver, copper and stainless steel ...