37 Installation, maintenance, servicing, repair, refurbishment, restoration and cleaning of underground inspection apparatus, instruments, equipment and systems and of parts and fittings therefor; installation, maintenance, servicing, repair, refurbishment, restoration and cleaning of apparatus, instruments, equipment and systems for inspection of pipes, pipelines, drains and sewers and of parts and fittings therefor; installation, maintenance, servicing, repair, refurbishment, restoration and cleaning of cameras and image recording apparatus and of parts and fittings therefor; information, advisory and consultancy services in relation to all of the aforesaid