Magneto-rheological brake-clutch apparatuses and methods are provided. The copper electroplating liquid of this invention includes the compound that has the structure of \u2014X\u2014S\u2014Y\u2014 where X and Y are each an atom selected from the group of hydrogen atoms, carbon atoms, sulfur atoms, nitrogen atoms and oxygen atoms, and X and Y can be the same only when they are carbon atoms, and a specific urea derivative. The robot has an image sensor for sensing the coded data, and a processor for generating indicating data using the coded data sensed by the image sensor. The second guide member is disposed downstream of the first guide member and includes a second inclined surface that contacts the sheets. In a medium that recordsplays back data including video data and control information, the control information includes information for accessing a specific portion of the video data. The invention also relates to a method of using and machine readable program for controlling the automated food product dispenser of the invention.