Abstract: A radio station presetting method for radio receivers performs seek-scanning to select a predetermined number of radio stations with a reception field strength higher than a specified level in descending order of reception field strength and to set data of the selected stations in a station-presetting memory. A predetermined number of radio stations with a reception field strength higher than the specified level which are not set in the station-presetting memory are stored in a second memory. Each time specific station data set in the station-presetting memory is desired to be deleted, the specified station data from the station-presetting memory is deleted and station data in the second memory with the highest reception field strength is written into the station-presetting memory and erased from the second memory.

Abstract: The present invention is directed to a structure in which an operation panel is removably provided on the front surface of a housing having a recording-medium playing mechanism provided therein, so that when the operation panel is separated from the housing, the recording medium is ejected from the housing and a recording medium insertion opening is closed when the recording medium is pulled out, or the opening is closed after the recording medium is reloaded in the case where the recording medium is not pulled out.

Abstract: The invention presents an electrophotographic photosensitive material possessing a surface layer excellent in wear resistance, without adversely affecting the photosensitive characteristics, wherein a photosensitive layer and a surface protective layer containing a thermoset silicone resin are laminated in this order on a substrate surface, and the silicone resin of the surface protective layer is hardened by a hardening catalyst mainly composed of a compound of the general formula (I) or an acid salt thereof which is selected from the group consisting of: a phenol salt, an octylic acid salt, a p-toluenesulfonic acid salt and a formic acid salt ##STR1##