21.   He also holds five world records for tourbillon, a mechanism used to maintain the accuracy of watches.

22.   In the future, when forests are in a more natural condition, prescribed fires will be used to maintain open stands.

23.   Roger Carnahan said he was having trouble with the artificial horizon, used to maintain level flight.

24.   The banks injected cash into Enron through various deals that the company used to maintain its image as a profit powerhouse, the suits said.

25.   The J-lead is a fish-hook shaped sensor that is planted in the atrium of the heart and is used to maintain a regular heartbeat.

26.   The revenue that is collected from water charges will be used to maintain the pumps, to buy fuel and pay staff, he said.

27.   The threat of airstrikes is used to maintain the pressure on the Yugoslav leadership to respect the Kosovo peace deal.

28.   Bullets made of hardened rubber are widely used to maintain order in various parts of the world, including in Northern Ireland.