The present invention provides a device for securely mounting goods on a display unit, the display unit having at least one mounting bar thereon. In connection with such system or method, plural multi-pixel target images of a field of view are obtained at different corresponding points in time over a given sample period. A pair of substantially annular clamping means are adapted to restrict longitudinal movement of the body and outer sleeve relative to the pipe string, each clamping means comprising a one-piece clamping ring and a fastener adapted to tighten the clamping ring around the pipe string. the next generation mobile telecommunication system UMTS.