There is disclosed a system and method for transferring a mobile handheld device between mobile carriers. One of the pair of shaft supporting portions functions as a gear-side supporting portion which is provided on a side where the gear is disposed. This invention is based on the fact that people have a tendency to attend or observe similar events as in the past and will show such tendency in the future. A heated temperature probe, located just before the outlet of the treatment container, measures the temperature at that location.