CPV code 50314000 designates Repair and maintenance services of facsimile machines in the Common Procurement Vocabulary (CPV 2008), the EU classification used to describe the subject of public contracts.
50314000 is a leaf code — the most specific level of its branch — so it can be used directly as the main CPV code of a contract notice. If it does not quite fit, check the neighbouring codes under 50310000 (Maintenance and repair of office machinery).