types of engineers

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Across
  1. 4. sewer systems
  2. 7. steam engine
  3. 8. potophone
  4. 13. job evaluation programs
  5. 14. gas
  6. 16. underground aquifer
Down
  1. 1. detailed instructions
  2. 2. prosthetics
  3. 3. mechanical arm
  4. 5. multipurpose solar grid
  5. 6. clocks
  6. 9. mobile games
  7. 10. spacecraft
  8. 11. cameras
  9. 12. hydraulic mathematic models
  10. 15. heating systems