Estuary NDT Instrument Co.,Ltd (DDYG) is located in the attractive Sino-Korean boundary city---Dandong. Founded in December, 2003, DDYG is established from the original Dandong Radiation Group Company Nuclear Instrument Factory, which is the professional manufacturer of gamma radiographic equipment with its history of 20 years.The main products of DDYG include: Co-60 Gamma Radiographic Equipment, Ir-192 Gamma Radiographic Equipment, Se-75 Gamma Radiographic Equipment, Butt-end Welds Gamma Detector, X-ray &Gamma-ray Pipeline Crawler, Portable X-ray Flaw Detector, Laboratory Alarming Instrument, accessories, and etc.Our gamma radiographic equipments are characterized by high automatic level, reliable quality and high security coefficient, due to the introduction of German technology and the optimized innovation of our staff. The domestic market share of Co-60 Gamma Radiographic Equipment produced by DDYG has reached up to 80--85% now.Our products are widely used in the field of oil pipeline, chemical, aviation, astronavigation, mechanism, boiler, pressure container, shipbuilding, national defense industries, and so on.DDYG keeps providing users with quality and reliable products, as well as excellent service. May the words pass from users to users, that the equipments produced by DDYG are trustworthy!