| 摘要 |
It comprises a hollow box A equipped with feet, which encloses a second hollow box B, on the faces of which there is a bright eye-catching colour. The box B is withdrawn from the box A by pushing on the side lever C, thus unlocking an internal spring mechanism which pushes the box B outside the box A. The present system aims to alert restaurant staff to the requirements of a table of people. <IMAGE>
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