| 摘要 |
<p>The apparatus comprises rotatable superimposed discs (3, 4, 5, 6) mounted on a base (2). The discs bear first indicia - for example, numbers - and the base a marker (10). In use of the apparatus, the user selects a particular sequence of the first indicia, aligns the sequence with the marker, enters specific items of information on the base at appropriate locations, further enters second indicia on or in relation to the first indicia bearing discs in proximity to the first indicia so that for any one item of information there is a generally aligned sequence of second indicia which to the user has relevance with respect to the one item of information, and scrambles this set position of the disc so as to conceal the particular sequence of the first indicia and the generally aligned sequences of second indicia.</p> |
