CPV code 50530000 designates Repair and maintenance services of machinery in the Common Procurement Vocabulary (CPV 2008), the EU classification used to describe the subject of public contracts.
50530000 sits under 50500000 (Repair and maintenance services for pumps, valves, taps and metal containers and machinery) and groups 2 more specific sub-codes. When classifying a tender, choose the narrowest code that still covers the full subject of the contract.