| 摘要 |
The support for a tray is a tubular frame with two bars (1) that rest on the barriers which are fixed to the bed. The ends of the bars have collars (3) which prevent them sliding off the barriers. The bars are joined by two cross bars (2) to form a rectangular opening that corresponds to the dimensions of the tray. The bars have double bends at their ends so that the frame can be put on the barriers at two different heights.
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