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- UIRAMUTÃ 1
- UIRAÚNA 1
- ULTRAVOLET RADIATIOM 1
- UMARI 1
- UMARIZAL 1
- UMBAÚBA 1
- UMBU 1
- UMBURANAS 1
- UMBUZEIRO 2
- UMIDADE 9
- UMIRIM 1
- UMUARAMA 1
- UN 1
- UNA 1
- UNAÍ 5
- UNASUR 1
- UNCONFINED AQUIFERS 1
- UNDERGROUND RECHARGE 1
- UNDERGROUND WATERS 2
- UNDERPLAING 1