| 摘要 |
<p>The roofing tile has a heat channel made of clay mixed with leaning and coloring agents, formed by upper and lower mirroring profiles. Two heating channels are formed on one tile, if the dimension of the tile is increased. Several flexible collector pipes made of silicone rubber are led into heat channel, to receive heat receiving medium containing mixture of ethylene glycol water, ammonia or aqueous solution.</p> |
