In the case of using a plurality of printing means, even if a feeding speed of each printing means of the plurality of printing means is varied, a print of superior quality is always provided. It has been proven that with the use of a thigh-supporting means, the measured blood-circulating parameter was much better than in a person seated without the use of a thigh-supporting means. The context may be displayed on the display screen as images, icons andor text such that it is easy to interpret warnings by the young, elderly, or the language-challenged.