A pump has a flexible liner which is expanded and contracted by application of positive and negative fluid pressure for receiving and discharging fluent material. The first drive device includes a motor, a motor control device, a connection-disconnection device, and a connection-disconnection device controller. The correction circuit is supplied with one or several filtered signals from the filter circuit and generates a corrected sensor signal from information derived thereby from a comparison of the filtered signals with the unfiltered sensor output signal, or a corrected signal derived therefrom, which is supplied to a further processing. A guide member, which includes: a pair of guide rails for guiding the IC package; and a link member for linking the guide rails to each other, is attached to the housing. Also provided are voice activated user interfaces with semantic and syntactic structures so adapted, as well as a prompting grammar and error handling methods adapted to such user interfaces. The trolleys are movable relative to the rotation of the platform, and are moved from the periphery to the center of rotation and vice versa during a complete rotation of the platform.