Engineering types

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Across
  1. 4. quality control systems
  2. 6. robots
  3. 10. flight systems
  4. 15. jet engines
  5. 17. electric circuits
  6. 18. manufacturing systems
  7. 19. offshore oil rigs
  8. 20. batteries
Down
  1. 1. farm tools
  2. 2. cosmetics
  3. 3. lab equipment
  4. 5. geothermal energy plants
  5. 7. systems that turn kinetic energy into electricity
  6. 8. pipelines
  7. 9. tunnels
  8. 11. dams
  9. 12. oil drills
  10. 13. nuclear power plants
  11. 14. buildings
  12. 16. race cars