Across
- 2. Smart traffic systems
- 4. Automatic feeders
- 6. Iron Lung
- 10. Laminated Sails
- 11. Artificial Intelligence
- 13. Solar Panels
- 14. Smartphone
- 15. LED
- 18. 3D printing
- 20. Memory foam
- 21. Xray
- 22. Hydroplanes
Down
- 1. Steam Engine
- 3. Internet
- 5. Fiber Optics
- 7. MSE Walls
- 8. Tractors
- 9. Fermentation
- 12. Gasoline
- 16. Water wheel
- 17. Radios
- 19. Wind Turbines
