The use of seamless steel tubes 20G transport oil | Gas Liaocheng seamless steel pipe manufacturer ATEN annual production and sales 20 #; 45 #; 16mn; 40cr 27simn other specifications of thin walled steel pipe; including structural tube; fluid tube; 16MN seamless steel tubes; Precision steel; steel pipe; low pressure boiler tubes; reinforced connecting sleeve with steel and stainless steel tubes and seamless steel pipe price list provided; company to customer demand as the center; in order to ensure an efficient system; wholeheartedly welcome you to visit; discuss business