... -400liter/h7ml/h52×32×30(CM)37KG47This flame polishing machine electrolyze water into hydrogen, then we can use hydrogen ... flame to do polish, and welding. No pollution. Application:This machine especially used in Jewelry, Perspex, electronic, electrical machinery, motol ... crafts.Gold, silver and copper point, surface weldingSeal the glass bottle, widely used for medicine bottle sealing.LED wafer fusion ...