The current invention is applicable to a RAN-cache or proxy operating in a wireless mobile network that is functioning as a transparent inline device intercepting wireless mobile protocols such as UMTS, LTE, WIMAX, CDMA etc. The wheelchair having at least one castor wheel mounted to the rear of the frame and pivotal about a substantially vertical axis, the frame being height adjustable in such a manner that when the frame is lowered, the seat is simultaneously tilted backwardly. Each TLB entry is associated with a virtual machine extension tag word indicating if the associated TLB entry is invalidated according to a processor mode when an invalidation operation is performed. Agitation members are pivotally mounted within the longitudinal grooves so as to be movable from an actuation position wherein the agitation members project outwardly from the body during rotation to agitate the slurry, to resting positions wherein the agitation members are folded within the grooves during installation or removal of the tool. The system receives digital content from content providers.