A solid terephthalic acid composition and a process for producing terephthalic acid from para-xylene. The interposer connector supports the interdigitated capacitor and has a first electrical conductor electrically connectable to the first track and the first capacitor terminals and a second electrical conductor electrically connectable to the second track substrate and the second capacitor terminals. When the data pool apparatus receives the print data and the access authentication information along with a registration request, the data pool apparatus registers the received print data and the access authentication information in the storage device so that the print data and the access authentication information correspond to each other. The display unit displays a first window for displaying label of each sub page designating a type which is binding with each sub page. In this manner, the mobile communication unit can obtain the power savings of being in primarily a power suspend mode, but still prevent the current connection from timing out. As a result of the intentional difference in natural frequencies of the two different turbine blades, the rotating disk does not experience flutter instability.