A child who has outgrown the internal harness or height limitations of a forward-facing child safety seat. Within the range of 40 to 80 pounds but under 4â9â. Within 4 to 8 years of age and is at least 35â tall.
tread. v. trod (trÅd) or treaded, trodÂ·den (trÅdâ²n) or trod or treaded, treadÂ·ing, treads. v. tr. 1. To walk on, over, or along: tread the pavement.
A bearing is a machine element that constrains relative motion to only the desired motion, and reduces friction between moving parts. The design of the bearing may, for example, provide for free linear movement of the moving part or for free rotation around a fixed axis; or, it may prevent a motion by controlling the vectors of normal forces that bear on the moving parts. Most bearings facilitate the desired motion by minimizing friction. Bearings are classified broadly according to the type of