Zhengzhou Siwei (group) Co., Ltd. is a company specialized in grain and oils, lecithin, feedstuff and protein industries. such as oilseeds pre-processing, oil extraction and oil refining.The engineering services include customized process design, consultancy, equipment fabrication, operators' training, process trouble shooting, process automation, turn key projects or supply of plant equipment and after sales service for components, spares and service parts for grain and oils, lecithin, protein, feedstuff. Till now, we have constructed/expanded/upgraded projects for more than 500...