Engineering services relating to construction; construction, maintenance and repair of buildings and factories; construction of ports; rental and maintenance of lifting and goods handling apparatus; installation and maintenance of pipelines; construction of bridges; underwater construction; installation, repair and maintenance of telephone and electricity networks; cleaning of buildings; rental of vehicles and plant for building sites; boiler making; installation and repair of heating apparatus; excavation, stone masonry, plumbing, plastering, cleaning and disinfecting services; all included in Class 37; but not including any such services relating to apparatus for use in connection with nuclear, space, medical, oceanographic, biological, and botanical sciences, industrial research and for academic instruction.;