| 摘要 |
<p>A panel 3 of non-inflammable expanded plastics material has a surface in the form of a relief and a coating of strong material thereon. The plastics material is preferably phenolic and the strong material concrete or plaster or resin. The panel may be split and have the relief surfaces placed face to face. The panel 3 may be continuously moulded between walls 2 in a machine 1, cut to size by a saw 4, and coated before and/or after transport to a building site. <IMAGE></p> |
