Across
- 2. X-rays machines to view bodies
- 5. water quality and sewage treatment
- 7. and Sewer-
- 9. and study DNA
- 11. -
- 12. animal habitats
- 13. components for railroads
- 16. medicine suitable for animals
- 18. for making sure your utilities are available
- 20. and builds tunnels and bridges
- 21. houses and buildings
Down
- 1. jet engines
- 3. paper making machines
- 4. highways and flow of traffic
- 6. sure buildings is structurally strong
- 8. anti lock brakes for cars
- 10. lighting manufacturing
- 14. with movements humans make
- 15. planes and air crafts
- 17. electrical wires and electrical poles
- 19. the stress point of materials