Trade and transport and aerial photographs

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Across
  1. 4. To bring goods into a country.
  2. 5. This means man-made.
  3. 7. Fast, but expensive mode of transport.
  4. 10. These photos are taken from the air.
  5. 12. A slow, but safe means of transportation.
  6. 14. Ships off-load cargo at these.
  7. 16. Trucks, cars and vans travel on these.
  8. 17. Johannesburg's international airport, O.R __
  9. 18. Low oblique photos are taken at this angle.
Down
  1. 1. These photos are taken at an angle.
  2. 2. SA's first rapid rail system.
  3. 3. To sell to other countries.
  4. 6. Trucks need to be _____ for fruit.
  5. 8. Good photos for drawing maps.
  6. 9. Best mode of transport for chemicals.
  7. 11. This is visible in a high oblique photo.
  8. 13. Transported by train.
  9. 15. Countries that have a ____ will import.