... Tianjin Haoyou Industry Trade Co., Ltd.,Tianjin Haoyou Industry Trade Co., Ltd., founded in 1993, ... the world, especially in the trading of steel and manganese ore, ... Export – Service:Manufacturing welded pipe and galvanized pipe, operating metal material trade, chain store for mechanical & electrical products, international ... and oil tank/oil depot, etc.*Import - Automobiles, skin weather from Dubai, ...