CPV code 45221210 designates Covered or partially-covered excavations in the Common Procurement Vocabulary (CPV 2008), the EU classification used to describe the subject of public contracts.
45221210 sits under 45221200 (Construction work for tunnels, shafts and subways) and groups 3 more specific sub-codes. When classifying a tender, choose the narrowest code that still covers the full subject of the contract.