A retaining element is disposed between two adjacent roller bodies of a roller bearing having an inner ring and an outer ring. The center bowl liner includes a disc-shaped element having top and bottom surfaces and a central opening for receiving a center pin. Each record defines a logical connection between one or more querents and one or more respondents. The data storage service may issue a split command defined in an API for the data store to divide the original and additional replicas into multiple replica groups, and to configure each replica group to maintain a respective portion of the table data that was stored in the partition before the split. Upon complete assembly of the tree, the uppermost hoop is extended toward the top of the tree and the hoops are expanded upward so as to form a decorative pattern of hoops with alternating angular orientations. In one example, the port throttle pressure sensor is sampled a plurality of times during a cylinder cycle and different engine operating conditions are determined from selected samples.