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.
Best Answer: There are two types of bearings, sleeve and ball (or roller). In each case, a spun bearing means the same thing, the bearing sleeve or ball race has attached itself to the shaft and the outer portion of the bearing is spinning in the bearing support structure.n each case, a spun bearing means the same thing, the bearing sleeve or ball race has attached itself to the shaft and the outer portion of the bearing is spinning in the bearing support structure.