Dandong Yangguang Instrument Co.,Ltd (DDYG) locates north-eastChina. Founded in December, 2003, DDYG is established from theoriginal Dandong Radiation Group Company Nuclear InstrumentFactory, which is the professional manufacturer of gammaradiographic equipment having 20 years' history.DDYG is focussing on manufacturing of isotope source projectorand x-ray projector as well as related pipeline crawler.