| 摘要 |
A shelf system is shown and described. In one embodiment, the system is for use with a post having at least one aperture. The system comprises a first head and a second head configured to mount to the post. The system also includes a collar configured to encircle the post and rest on the first and second heads. The collar may engage a shelf or may be integral with a shelf. The collar has an inner track configured to contact the first head and an outer track configured to contact the second head. The collar is configured to allow the shelf to rotate around the post from a first rest-position and return to the first-rest position without encountering a second rest-position.
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