11
Water purification installations; water purifying apparatus
and machines, namely, water filtering units, filtering units
for chemical liquids; biofiltration units; membrane
filtration units; waste water clarification and purification
plants for municipal waste water as well as for industrial
waste water; process water treatment plants for treatment of
fresh and recycled water; potable water treatment plants for
treating surface water as well as ground water; sea and
brackish water desalination plants; sludge treatment plants
37
Erection, construction, construction supervision, building
commissioning, maintenance, retrofitting and repair of water
treatment facilities, namely, waste water clarification and
purification plants, process water treatment plants, potable
water treatment plants, desalination plants, sludge
treatment plants
42
Technical consultation, engineering, design and project
planning in the field of water treatment facilities, namely,
waste water clarification and purification plants, process
water treatment plants, potable water treatment plants,
desalination plants, sludge treatment plants; scientific and
industrial research and development as well as technical
process modelling of water treatment facilities, namely,
waste water clarification and purification plants, process
water treatment plants, potable water treatment plants,
desalination plants and sludge treatment plants
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