| 摘要 |
<p>A composite roof tile (2) is made by forming a cementitious material (38) to which there is secured by an adhesive (34), precure or postcure, a unitary or multi-port surface element (30). The surface element (30) may provide a base layer, that is the underside in use of the composite roof tile (2), or, the surface element (30) may provide an upper layer, that is the upper side in use of the composite roof tile (2).</p> |
