| 摘要 |
A food shelf attached to the lower end of a vertical threaded rod engages a nut that is attached to the summit of an arch that rises from a horizontal frame. The frame may be removably set onto a receptacle containing a source of heat, or the same frame can be supported above a source of heat on a set of removable legs. In each case, the height of the food shelf above the source of heat may be adjusted by turning the vertical threaded rod.
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