A mold releasing agent suitable for easily casting a cylindrical cast member which is superior in adhesion on cast parts at low cost, is provided. The link-usage level calculating section calculates a current usage level indicating a level of usage of the radio link associated with current data reception in the radio communication terminal. The text data, however, utilizes the Unicode Standard to identify its characters. Each locking projection terminates inwardly of the outer surface of the front edge of the closure portion peripheral lip and each tab terminates below the upper surface of the closure portion peripheral lip. Because it does not include a motor for rotating a beam-sweep mirror, the scanner is often smaller and uses less electrical energy than motorized bar-code scanners.