| 摘要 |
<p>A heated door is formed by two wooden face panels rendered fire-resistant, which are spaced apart by laths which define flues at the base of which are arranged one or more electrical heating elements. Openings are formed in the upper part and the lower part of each of the two face panels and into them are fitted deflectors or they are blocked by covers which are connected to the deflectors by screws. Arrangements are made for supplying power to and regulating the door and making it safe to use.</p> |
