The registration address of the river nord-nord filtering equipment limited is located in kibbutz village of the sanctuary camp in guangan county, namang city, hebei province, with the registration authority being the san-ann county market supervision authority, with representatives of legal entities, including the processing and sale of filters, cores, oil filters, dust removal equipment, purification equipment and accessories; the processing and sale of filters, filters, filters, filters, filters, filters, filters, filtration materials (except for the approval of dangerous chemicals and preparations), the sale of steel; the processing and sale of mechanical accessories, plastics (except for medical purposes); the design and development and technology transfer of moulds; the design and development of separation equipment, hydraulic valves, design, installation and sale of mechanical products; technical advice and technical services for filtering equipment; post-sale maintenance ser...