| 摘要 |
The construction elements each consist of a central section (10) and two outer sections (20, 30). The central section (10) has six straight, plane surfaces, two parallel, relatively long walls (11) and four walls (13, 14, 15, 16) which intersect one another in pairs at right angles by means of extensions. The outer sections (20, 30) are of cylindrical design and the segment of the cylindrical wall (22, 32) which lies against the central section (10) intersects the four walls (13, 14, 15, 16) so that a concave recess is formed there. The outer sections (20, 30) are half the height of the central section (10). Thus, these elements can be placed together in a row with the outer sections (20, 30) overlapping one another so as to form a carriageway border which can readily be altered or removed at any time without the elements being lost in the process. …<IMAGE>… |
