Zhengzhou DingSheng Machine Manufacturing Co., Ltd. is one of the leading manufacturer of 1.Oil press 2.Leaching plant/oil extraction 3.Oil refining with advanced technology and testing equipment, located in Zhengzhou City(capital of Henan province), is a joint-stock enterprise. The corporation was established in 2002, the main business of which is engaged in oil engineering R&D, equipment manufacturing, installation commission and training services. The company has oil chemical, ...