| 摘要 |
<p>The compass (8) has digital luminous screens e.g. liquid crystal display, visualizing measurement of distance between a point (7) and a face of the compass, and angle between two points, where the point and the face are provided in the extension of legs (9) to avoid the bending while measuring the distance. The screens are fluorescent to emphasize measurement indicated in centimeters and millimeters according to selected scale. Shape of each screen differs according to a surface, where each screen has shape of square and triangle for the measurement of the distance and the angle, respectively.</p> |
