| 摘要 |
<p>The solar heat collector roofing material normally consists of transparent material, which does not harmonise with other houses in the neighbourhood. A coloured structural material is therefore used, which is transparent only to wavelengths of over 500 nm, i.e. the long waves. Material such as red acrylic glass is suitable for this purpose and reflects much less than transparent material. This roofing blends in well ith the normal red roof tiles of houses.</p> |
