| 摘要 |
PURPOSE:To quickly retrieve a drawing of latest edition by obtaining the address of the drawing number registered last out of a control table based on a read key and reading the drawing number and the attendant data written in said address out of a real data part for display. CONSTITUTION:When an optional drawing number D is checked, the key inputted previously to the number D via an input means 3 is extracted by an extracting means 4. Then a display means 5 obtains based on said extracted key an address where the number D registered last is stored in a read data part 20 out of a control table 10. Furthermore, the number D and the attendant data written in said address are read out of the part 20 and displayed. Thus it is possible to obtain quickly the drawing of the latest edition even in case the drawings of the same number are changed many times.
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