solar glass vacuum tube manufacturer, vacuum tube solar cooker

  Shandong Zentek technology is one of the professional supplier of water heater anode in the word. Our company has been approved by GB/T19001-2008 (ISO9001-2008), Our products have passed the test of DNV.BV.CCS and other international well-known certificate authority. After 10years hard work and development, we have more than 100 customers all over the word, especially America and Europe and local China. Our principal aim is to provide you the highest quality of products and integrity of service and lowest price.