11
Wastewater treatment installations; waste water treatment
apparatus; wastewater treatment tanks for industrial use;
sewage purification facilities; wastewater purification
installations; wastewater treatment installations;
bioreactors for the treatment of waste water; apparatus for
filtering drinking water; water filtering installations;
water filtration systems; water purification installations;
water purifying apparatus and machines; water sterilizers
37
Providing information relating to the repair or maintenance
of water purifying apparatus; provision of information
relating to the repair or maintenance of water pollution
control equipment; providing information relating to the
repair or maintenance of water purifying apparatus;
installation of water supply apparatus; installation,
maintenance and repair of sewage systems; repair or
maintenance of water pollution control equipment and
provision of information relating thereto; Repair or
maintenance of water purification apparatus and provision of
information relating thereto; repair of water purifying
apparatus; repair of water supply installations;
maintenance of water-purifying apparatus
40
Treatment of drinking water, service water and waste water;
provision of information relating to water treatment
services; rental services for water treatment equipment;
water treatment and purification services; water treatment
and provision of information relating thereto
42
Technical planning and design of water purification plants