7
Machines, namely, for water treatment and purification, removing waste material, and separating target materials from mixture of materials; drainage machines; drilling machines; grinding machines; crushing machines; rammers machines; pumps; filtering machines; machine tools
11
Water purifying apparatus and machines, water purification installations, purification installations for sewage
37
Installation and repair of wastewater treatment machinery, namely, installation and repair of machines for water treatment and purification, removing waste material, and separating target materials from mixture of materials, drainage machines, drilling machines, grinding machines, crushing machines, rammers machines, pumps, filtering machines, and machine tools
40
Treatment of materials, namely materials treatment services in connection with waste treatment, water treating, water purification, and sand classification
42
Scientific and technological services, namely, scientific research and development and development of new technology for others in the field of water treatment and purification; technological consultation in the field of water treatment and purification; research and design services, namely, research and design services in the field of water treatment and purification; industrial research in the field of water treatment and purification