A rough-terrain traveling vehicle equipped with a front seat roll bar and a rear seat roll bar is adapted to allow use of only the front seat roll bar. To provide a method of realizing at a low cost wear resistant and fading resistant gradation expression on an anodic oxidation film. A dielectric pattern is formed in each first gap and spacers are simultaneously formed on sidewalls of each second gap, wherein a first trench is formed between the adjacent spacers and exposes a portion of the first mask layer. The determined timing offset is reported to compensate for delay in the multiple access network and the subject CM.