A transmitter is provided for amplifying signal power in a communication system. Between the inner ceiling and the inner bottom there is at least one load support, which is movable against goods to be loaded in the container such that the goods can be supported against the load support at least in one direction. : generating A first list LAC\u20141 of airport names Ai is generated. Thereby, the user can use the display unit at different times and at different positions with simple manipulations. The magnitude, direction and duration of the force are dynamically controlled by the electrical input and can be altered during the course of an actuation cycle. 0 or more; and a cleaning member rotating the surface layer of the charge member in contact therewith to remove foreign particles on the surface layer.