A spring strut comprises a pneumatic spring and an oscillation damper and is fitted between a vehicle body and a wheel of a vehicle. Methods for producing a maize plant that comprise crossing inbred maize line PH8TN with another maize plant. The holes may be filled with materials which provide a photonic crystal. The seed patterns are a sub-set of a test pattern set preferably generated by software such as the Automatic Test Pattern Generator. When other than the oldest snapshot file system is deleted, the respective save volume is retained as a hidden object until it becomes the oldest save volume.