Installations and apparatus, all for sterilising, disinfecting or deodorizing, namely, installations and apparatus for sterilising, disinfecting or deodorizing water, air and surfaces; Installations and apparatus for the treatment of articles or fluids with ultraviolet light, namely, installations and apparatus for sterilising, disinfecting or deodorizing articles or fluids with ultraviolet light; structural parts for all the aforesaid goods