... certificate 3.Automatic welding BMM400 Multifunctional laser welding machine Introduction Suitable for welding of thin plates within ... materials and application Suitable for welding of kettle, vacuum cup, stainless steel bowl, sensor, tungsten wire, high ... triode), aluminum alloy, laptop shell, mobile phone battery, door handle, mould, electric apparatus fittings, filter, nozzle, stainless steel ...