The KDON-4000/4000 air separation plant designed and manufactured by DEAR air separation and installed on the construction site of Anyang Jiuyang city was successfully started in July 28, 2007, and the production purity all reached the design index requirements. and it created the fastest installation project in the history of our company, and it only took 3 months (2007.4.28 -- 2007.7.28) from the start of installation to oxygen output ). create a good example for the company's project progress in the future!