Air cleaning units; Air cleaning units containing an air filter, ultraviolet lights and a photocatalytic filter; Air purification units; Air purifiers; Air purifying apparatus; Air purifying apparatus and machines; Air purifying units for industrial use; Air sterilisers; Air sterilising apparatus; Air sterilizers; Air sterilizing apparatus; Coils as parts of distilling, heating or cooling installations; Electric air deodorizers; Electric air sanitizing unit; Industrial air filter machines; In...

Air cleaning units; Air cleaning units containing an air filter, ultraviolet lights and a photocatalytic filter; Air purification units; Air purifiers; Air purifiers; Air purifying apparatus; Air purifying apparatus and machines; Air purifying units for industrial use; Air sterilisers; Coils as parts of distilling, heating or cooling installations; Electric air deodorizers; Electric air sanitizing unit; Germicidal lamps for purifying air; Household air cleaners; Industrial air filter machines...

quality control for others, namely, inspecting and identifying defective coils in application of steel pickling and rinsing technologies