Vocabulary exercise

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Across
  1. 3. Heavy equipment runs thanks to ... pressure.
  2. 5. ... help identify system faults.
  3. 7. Regular ... keeps machines working.
  4. 8. ... is a system response delay.
  5. 9. What is used in hydraulic systems?
  6. 10. Instead of wheels most excavators have ...
  7. 11. A ... starts the main software.
Down
  1. 1. ... increases system reliability
  2. 2. A ... defines communication rules.
  3. 4. ... improves efficiency.
  4. 6. What detects position or temperature?