... , corrosion resistance etc.Tianjin Haoyou Industry Trade Co., Ltd.,Tianjin Haoyou Industry Trade Co., Ltd., founded in 1993, is a subsidiary ... Bangladesh and other countries*Export – Service:Manufacturing welded pipe and galvanized pipe, operating metal material trade, chain store for ... process oil, naphtha and oil tank/oil depot, etc.*Import - Automobiles, skin weather from Dubai, Kenya, Saudi ...