Bowling terms

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Across
  1. 2. The objects on the ground used for major aim adjustments
  2. 4. A spare with two or more pins with a gap between them
  3. 6. The part before the lane where one steps before throwing
  4. 10. When the bowling ball crosses the lane to hit the opposite strike spot
  5. 12. Track for balls to return to the bowler
  6. 15. The place where the ball rolls
  7. 16. All ten pins on the first roll
  8. 18. Used by amateur bowlers to keep ball out of gutters
  9. 20. Ball hitting the gutter and no pins
Down
  1. 1. The objects on the ground used for minor aim adjustments
  2. 3. Getting all the pins in two rolls
  3. 5. Three strikes in a row
  4. 7. Hitting between the first two pins on either side
  5. 8. Four strikes in a row
  6. 9. When the ball curves into the pins
  7. 11. Applied to the lane to make balls roll
  8. 13. When one gets a strike or spare in the first two throws of the last frame
  9. 14. A score adjustment to even playing field
  10. 15. The pins not knocked down by the first roll
  11. 17. One tenth of the score sheet
  12. 19. Stepping onto the lane over the line