We (Zhengzhou Rudde Optoelectronics Technology Co.,) are a professional manufacturer and developer for NDT ( non-destructive testing ) in China , founded in 2006 , and we have been engaged in the field for many years , and there are lots of customers and distributors belongs to us all over the world . " DELLON" has already been a well-known international brand in the field of NDT . Our products are very popular in Europe, America and Asia , and there are some customers in Middle-East and Africa , too . There are over 100 stafff in the company , and there are our office and branch in Shenzhen , Nanjing and Zhengzhou . Head office in zhengzhou , Factory, Research & Developing Center, Marketing department in Zhengzhou . For many years , we developed and produced all kinds of portable industrial video endoscope , which are widely used in Power, Petrochemical, Aviation, Police Counter-terrorism, Nuclear industry, Customs, Military, Shipbuilding, Automobile and Locomotive manufacturing, Heavy industry equipment, and so on . Every year , we can develop 2 C 3 new models , and most of our products are very popular in the fields above . ISO9001:2000 certificate has already been passed , and CE, RoHS is compliant . Our products are guaranteed by international system certification . And we can offer best service after sales , immediate repairing ( 1 week to 3 weeks ) , 12 months for warranty freely . OEM/ODM/OBM order is welcome . All in all , we hope we can set up a long business relationship with overseas business partners . Zhengzhou Rudde Optoelectronics Technology Co. is a seeking global co-operation agents for our products.