... 3.Small occupation area 4. energy saving. high frequency induction welding equipment,high frequency induction welding furnace,induction welding machine. ... -100 KHZ20-30mm above the tool to apply high-frequency 10-50 KHZ, super audio 30 mm above the ... duty cycle design, can work away2.protection function perfect, high reliability, small volume, light weight, simplified installation, easy operating ...