Water storage

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Across
  1. 2. Very deep but narrow well
  2. 4. Tanks for storing water in cities
  3. 7. Storage of water on forts
Down
  1. 1. Big clay jars for free water
  2. 3. Useful when room is dark
  3. 5. Small wells to draw water using small pot
  4. 6. A large dam in Maharashtra