... 3 delivery fast 4 Low energy consumption Super-audio Quenching Machine For 600mm Gear Main Features: 1, transistor (IGBT) high ... overheating, lack of, water and other self-protection. 5, use large scale integrated circuit digital automatic control, with manual, automatic ... frequency tracking, stepless power adjustment, easy to use, 10 minutes to learn to use. 7, we have a complete sales service ...