tianjin lefin industry group  containing tianjin lefin industrial co.,ltd 、tianjin lefin steel import & export co.,ltd、 lefin steel 
hongkong co.,limited and tianjin shengqifeng international trading co.,ltd. its total assets is more than 30 million usd and our mills 
totally has more than 90,000 square meters.the annual production of welded tube is more than 300000 tons per year. th...