A method is provided for preparing a supported cobalt-containing catalyst having substantially homogenously dispersed, small cobalt crystallites. If no command input is given from the player within a lapse of the idle time, expression of a character image being displayed is changed, and further, the idle time is shortened for the next input selection request. The left rail is provided for attachment to a left pickup truck bed sidewall, and the left rail includes a first slot for attachment to a left pickup truck sidewall and a second slot. The display device includes a second common electrode separated from the first common electrode line with a protective layer therebetween, and configured to include two second common electrode plates which are separated from each other in a left and right direction with respect to the first common electrode line. When available, the demand for the benefits of rotary piston power in air, surface, and marine applications, will be immediate and rewarding.