Athenian cultural dominance continued throughout the Roman period, and the buildings added to the Agora reflect the educational role of the city, a role that ended only with the closing of the pagan philosophical schools by the Christian emperor Justinian in A.D. 529.
Bearing, in machine construction, a connector (usually a support) that permits the connected members to rotate or to move in a straight line relative to one another. Often one of the members is fixed, and the bearing acts as a support for the moving member. Most bearings support rotating shafts against either transverse (radial) or thrust (axial) loads.
Wheel bearings are bearings between the wheel and the axle. Read here if you donât know what a bearing is - Bearing (mechanical) - Wikipedia. Simply, it âbearsâ the weight. Without a bearing, the wheel would rub through the axle - bearings spread the load and make the wheel spin freely.