| 摘要 |
The heat-retaining box consists of a sturdy heat-insulating material and an internal stainless sheet-metal container with a leaktight hollow space and a compartment for the food bowl. By filling the hollow space of the sheet-metal container with hot water and owing to the heat-insulating envelope, heated food can be kept warm over many hours. This energy-saving, simple heat-retaining box may be useful especially for old or sick people. Delivery firms for ready-made hot food may have an interest in the manufacture of the heat-retaining box.
|
