| 摘要 |
<p>The template is made from a plate of transparent and hard synthetic material, with a thickness of about 1 1/2 mm. The axonometric representations of circles, that is to say the projections of the circles, are arranged so that the small axes of the projections of the circles adjoined to the different series are located on a straight line. The lateral sides of the template extend in the same direction as the axonometric axes which subtend the angles α, β, η. The projections of the circles of different diameters are adapted by their centers to the perpendicular of the co-ordinate planes defined by the co-ordinates, that is to say to the straight lines of the small axes of the projections of circles which represent in the space their rotation axes. The axonometric axes traversing the centers of large projections of circles are at the same distance from the lateral sides which are parallel to the axes. The lateral sides are provided with a scale which corresponds to the scale of the axonometric parallel axes. The stereoscopic template may be obtained for any system of axonometric axes. It has advantageously an hexagonal shape.</p> |
