Eastone was established in 1990. We introduced advanced foreign power supply product technology and management. And we digested and improved the technology, finally we researched and developed all-solid medium frequency power supply, ultra-audio frequency power supply, high frequency power supply, intelligent PWM AC voltage regulator and IGBT high frequency inverting DC power supply, APF etc. Our products have been classified as Innovation Fund Project of MOST and National Torch Plan Project for many times. Our company is awarded High and New Tech Enterprises of Jiangsu Province and Re-contract and Trustworthy Enterprise. We have so far thousands of all-solid medium, ultra-audio frequency and high frequency power supplies applied to induction heating, heat treatment and welding pipe at home and abroad. And about 30000 power controllers are applied to various electric heating and vacuum furnaces. Also we have already about 5000 power supplies applied since we entered crystal growth industry 2010.