Air sterilizers; air sterilizers for household purposes; air sterilizing apparatus; ultraviolet sterilizers; flushing apparatus; flushing tanks; flushing tanks for toilets; flushing tanks for water-closets; flushing tanks for lavatories; flushing cisterns for toilets; flushing cisterns for water-closets; flushing cisterns for lavatories; sterilization, disinfection and decontamination equipment; water disinfection apparatus; disinfection robots; saturated steam cleaners being sterilizers for the disinfection of homes and offices; saturated steam cleaners being sterilizers for the disinfection of hospitals and clinics; water sterilizers; water purification apparatus; wastewater purification units; water purifying apparatus and machines; water purification and filtration apparatus; water purification machines; water purifiers for household purposes; water purifiers for industrial purposes; electric water purifiers; wastewater filtration apparatus; water filtering apparatus; water filtering units; disinfectant apparatus for medical purposes; disinfectant apparatus; medical sterilization devices; steam sterilizers for medical purposes; sterilization units for medical purposes; sterilizers for medical instruments; apparatus for disinfecting medical materials; air deodorizing apparatus; deodorizing apparatus, not for personal use; electric air deodorizing apparatus; plug-in diffusers for air deodorizers; germicidal burners; laboratory burners; wastewater treatment apparatus; water treatment apparatus for water purification; wastewater treatment systems by aeration; waste water treatment tanks; wastewater treatment tanks for household purposes; wastewater treatment tanks for industrial purposes; electrostatic water treatment apparatus; electrostatic water treatment devices; domestic water filtering apparatus; ionization apparatus for the treatment of water; environmental control apparatus being particle activator apparatus for use in the treatment of industrial wastewater; environmental control apparatus being particle activator apparatus for use in the treatment of municipal wastewater; ultraviolet sterilizers for water treatment; machines for the treatment of waste and wastewater; membrane filtration units for water treatment apparatus; bioreactors for use in the treatment of wastewater; water treatment apparatus being clarification and thickening apparatus for use in the treatment of wastewater; germicidal lamps for purifying air; germicidal lamps; lamps; outdoor lamps; ultraviolet lamps, not for medical use; laboratory lamps.