Apparatus for filtering water; Apparatus for freezing; Apparatus for purifying water; Apparatus for softening water; Apparatus for the decontamination of water; Apparatus for purification of liquids; Apparatus for the removal of suspended solids from a liquid; Cooling installations for freezing; Cooling installations for fluids; Cryogenic apparatus; Desalination apparatus; Desalination plants; Desalination installations; Evaporators; Heat exchange apparatus (other than parts of machines); Installations for purifying water; Installations for the purification of waste water; Machines for purifying water; Portable filtration units (other than machines); Settler apparatus for water; water chillers; water boilers; water desalinating apparatus; Chemical processing of liquids; Chemical recycling of waste products; Chemical treatment of waste products; Demineralisation of water; Desalination; Metallurgical processing; Operation of water treatment facilities; Purification of liquids; Regeneration of water; Rental of water treatment equipment; Treatment (purification) of water; Treatment of liquids; Water purification; Water treatment services; Analytical laboratory services; Chemical analysis; Chemical research; Chemical technological research; Conducting of feasibility studies (scientific research); Conducting technical project studies; Development of test equipment; Development of testing methods; Geotechnical investigations; Geotechnical services; Inspection (testing) of plant and machinery; Material testing; Metallurgical analysis; Metallurgical testing; Metallurgical laboratory services; Preparation of technical reports; Preparation of technical studies; Technical data analysis services; Technical diagnostic testing services; Technical engineering; Water analysis.