Invention Parts

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Across
  1. 2. A cylindrical tunnel
  2. 4. A device to make the machine work
  3. 7. In case of accident
  4. 10. In the shape of a triangle
  5. 11. Where something comes out
  6. 12. A warning shinning on and off
  7. 14. A hard material like steel
  8. 16. A material made from trees
  9. 17. In the shape of a rectangle
Down
  1. 1. A rod to pull to move another part
  2. 3. A 3D circle
  3. 5. A manmade material
  4. 6. Small round pieces to press for functions
  5. 7. Where something goes in
  6. 8. A 3D square
  7. 9. The flat area with the control buttons
  8. 13. A round 3D rectangle
  9. 15. A moveable piece to turn on and off