A cordierite sintered body and a member for semiconductor manufacturing apparatus are disclosed. A database of landmarks can be used to determine the location of a user who can merely describe their location in the same manner they would to any human contact. Based on the usage characteristic, the quality of the video 110 is degraded 210, wherein the degraded video 140 requires less memory. A ball is located between the recess and another recess carried by a second surface of the plate. The lids and bases can be stored and shipped in nested condition and erected simply by snapping the lid onto the base.