| 摘要 |
An apparatus including an inner member (30) mounted for rotation about an axis (42), an outer member (34) mounted for concentric rotation about the inner member (30) relative to the axis (42), the outer member (34) having an inner surface (58) adjacent the inner member (30) and an outer surface (34), and a sensor (74) mounted adjacent the outer surface (62) of the outer member (34) so as to measure the rotational speed of the inner member (30). <IMAGE> |
