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   Dandong TongGuang Electronic-Communication Instrument Corporation LTD. is situated at the greatest frontier city of our country-Dandong which is the base of radiative in strument in china and has the limitness business opportunities. This corporation has undergone the research manufacture with x-ray NDT equipments for 10 years and the rapid development from a narrow special realm to wide space of application that not only has made it a speialized corq. with technical research manufacture asle and service but also is only one of business enterprise with the accessories big-all for x-ray equipment in china.