... CE certification, ISO9001:2000 4. Heating,annealing, brazing etc 25kw Induction Sealing Machine DD-25IIMain Features:1. It adopts the latest MOSFET ... lighter, most of the artifacts are not gas.3) The equipment needed by adjusting the operating frequency and power, the surface ... strength and toughness are high.4) After heat treatment by induction heating of the workpiece, the surface under a thick layer ...