| 摘要 |
<p>The concrete component is for use in landscape gardening and particularly as a support on slopes. It is prismatic in shape, with three arms (1) extending in different directions. It can be symmetrical in relation to the centre line of one or more of the arms, and can be radiused (2) at the corners between the arms. The ends of the arms can be radiused, or chamfered at an angle of 30 deg., and one or more of them can be of swallowtail section for part of its height.</p> |
