OTVD

water treatment and purification apparatus; industrial and domestic waste treatment apparatus and apparatus for overseeing treatment of sludge from sewage plants; water treatment and purification units; treatment units for treating industrial and domestic sewage, industrial and domestic waste and sludge from sewage plants

operation for others of water treatment and water purification units, industrial and domestic sewage treatment units, waste treatment units, plants for the treatment of sludge from sewage plants, industrial waste valorization (transformation into noble material) plants, and chemical treatment of smoke purification waste materials plants

constructing water treatment and water purification plants, industrial and domestic sewage treatment plants, industrial and domestic waste treatment plants, plants for the treatment of sludge from sewage plants, industrial waste valorization (transformation into noble material) plants, and smoke purification waste materials chemical treatment plants

water treatment and water purification services, industrial and domestic sewage, waste and sludge treatment services, industrial waste valorization (transformation into noble material) services, and chemical treatment of smoke purification waste materials services

training and instruction of personnel in the fields of constructing and commencing operation of water treatment and water purification plants, industrial and domestic sewage treatment plants, industrial and domestic waste treatment plants, plants for the treatment of sludge from sewage plants, industrial waste valorization (transformation into noble material) plants, smoke purification waste materials chemical treatment plants, water treatment and water purification services, industrial and domestic sewage, waste and sludge treatment services, industrial waste valorization (transformation into noble material) services, and chemical treatment of smoke purification waste materials services

consulting services in the fields of constructing and commencing operation of water treatment and water purification plants, industrial and domestic sewage treatment plants, industrial and domestic waste treatment plants, plants for the treatment of sludge from sewage plants, industrial waste valorization (transformation into noble material) plants, smoke purification waste materials chemical treatment plants, water treatment and water purification services, industrial and domestic sewage, waste and sludge services, industrial waste valorization (transformation into noble material) services, and chemical treatment of smoke purification waste materials services; engineering; conducting technical project feasibility studies; engineering and research in water treatment and water purification; engineering and research in treatment of industrial and domestic sewage, waste and sludge from sewage plants; engineering and research in industrial waste valoriztion (transformation into noble material); engineering and research in chemical treatment of smoke purification waste materials