| 摘要 |
<p>The circular paved area comprises a number of radially outwardly widening wedge stones (6) hexagonal in plan view, between w for filling the intermediate space are rows of rectangular stones. Each wedge stone has two opposing parallel side surfaces (7,8 the same length. Each wedge stone has two opposing parallel side surfaces (7,8) of equal length and the two side surfaces (9,10) evolving fr the opposing side edges (21) form a right angle (11).</p> |
