Abstract: The present invention is a folding-type communication terminal which includes first display means which is positioned so as to be visible when a main body of the communication terminal is in a folded state, second display means which is positioned so as to be concealed when the main body is in the folded state, storage means for storing at least one set of a piece of first information and a piece of second information, detection means for detecting that the main body has been put into an unfolded state, first display control means for having the piece of first information displayed on the first display means; and second display control means for having the piece of second information displayed on the second display means, when the detection means detects that the main body has been put into the unfolded state while the piece of first information is being displayed on the first display means, wherein the piece of second information belongs to a same set as the piece of first information.

Abstract: The present invention provides a light guide plate and a surface light source using the light guide plate to improve the utilization efficiency of external light and light from an internal light source and to achieve thinner width of the light guide plate. In this invention, internal light emitted from an internal light source 3 is brought to the inside of the light guide plate 1 from an internal light collecting surface 16 in the light guide plate 1, and external light such as natural light is brought to the inside of the light guide plate 1 from an external light collecting portion 11. The light brought to the inside of the light guide plate reflects and is converged several times from a reflective plate 15 mounted to the outside of the light reflective surface 14 and three side end surfaces 12 and is emitted from the light emissive surface 13 of the light guide plate 1 to a diffusing plate 6.

Abstract: In the case of a feeding apparatus which automatically performs drainage of a processing solution from a first tank and replenishment of the first tank with a processing solution by the use of a timer, when a pipe for sending NH4OH from the first tank to a scrubbing unit (SCR) is clogged, no liquid level is detected by a lowermost limit sensor before a set time of a replenishment timer expires, whereby replenishment of NH4OH is not started. Consequently, there never arises such a situation that remaining NH4OH and new NH4OH are mixed in the first tank.

Abstract: A drainage pump (10) in which the portion near the entrance of the impeller (12) in the suction tube (11) is open to the set lowest suction water level (L.W.L.) through an air intake pipe (15), so that air is introduced into the portion near the entrance of the impeller (12) when the suction water level (W.L.) is lower than the preset lowest suction water level. An air intake hole (14) may also be provided through the water intake suction tube (11) near the impeller.