Juha's crossword

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Across
  1. 2. choice
  2. 3. Usually liquid that machine needs to work
  3. 4. Operates by it self
  4. 5. Part that is needed to make machine work
  5. 7. Needs little fuel to product more energy
  6. 9. Maintains and monitors machines
  7. 11. Waste made by burning fuel in machine
Down
  1. 1. Machine that turns fuel to spinning energy
  2. 6. Something is used first time to make sure it works correctly
  3. 8. General word to describe machines that move
  4. 10. Movable or/and combact