... machine 4:igbt power supply ZhengZhou Gao's HF induction heat treatment equipment Main advantages:1)Heating ... light weight, easy to use 4)Simple operation: a few minutes to learn 5)Start fast: you ... shafts, cams, sprockets, gears, valves, ball stud, a large machine tool guide, ductile iron quenching. 3, ... FOR YOUR ATTENTION TO OUR PRODUCTS ONE CHOICE ! A LIFETIME FRIENDS ! We will provide you the best ...