Strict crafts. Sand filters, active crane filters, degassers, deionizers, aerators, deaerators, etc., automatically and semi-automatically with FRP and metal materials and equipment for industrial and urban wastewater treatment systems, primary treatment, secondary treatment, water sludge balancing According to the effluent standards, all kinds of anionic and cationic resins and spare parts of industrial water purification devices and cartridge filters from one micron up and all kinds of membranes.