... tube,it save40-60% energy, comparing with thyristor,it save 20% energy; it save60% water. High frequency ... tools, bit welding welding, cut teeth welding, copper pipe welding, drilling tools, stainless steel welding welding.Turning welding equipment-16 KW ... work before forging heating, heat treatment, brazing, etc Lathe tools with 16 KW high frequency welding welding machine