... -4KHZ1-2.5KHZ1KHZ0.8KHZ0.8KHZ0.7KHZ0.7KHZ0.5KHZYiphee electric furnace co .,LTD (Guangdong Of China)speciality produce induction ... smelting furnace,induction heat boiler, Attempt Electric Furnace, Forges Electric furnace, ... melting aluminum induction furnace,melting copper electric furnace and steel smelting medium frequency induction furnace.