Shanghai Cooldo Industrial Co., Ltd. has specialized in manufacturing and marketing of induction heating machines since 2005. Our machines includes medium frequency series(1k-20khz), high frequency series(30k-80khz), ultrasonic frequency series(5k-40khz) and the ultra-frequency series and they are wildly used in heat treatment, bonding, brazing, welding, forging, melting and heat fitting solutions. Transistor converters from 500Hz to 300KHz frequency & power sizes from 5 to 300 KW. To ...