| 摘要 |
A shelf and swivel for supporting a shelf for rotation with respect to an underlying base, the shelf including an off-axis aperture, the swivel including a first member having a plurality of openings to receive fasteners for securing the swivel to the underlying base and a pair of downward projections straddling one of the openings. A second swivel member, coupled to the first swivel member for rotation about a vertical axis, is secured to a lower surface of the shelf so that the first member openings are serially accessible through the shelf aperture. A first fastener is installed through the shelf aperture and aligned first swivel member opening into the underlying base with sufficient force to embed the projections in the underlying base, thereby inhibiting movement of the first swivel member sufficiently to permit rotation of the shelf to serially expose additional first member openings to receive additional fasteners.
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