APT

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Across
  1. 3. advantage
  2. 5. combustion engine
  3. 6. chamber
  4. 8. machine
  5. 10. cooling system
  6. 12. filter
Down
  1. 1. chart
  2. 2. graph
  3. 4. plane
  4. 7. motion
  5. 9. plug
  6. 11. motion