| 摘要 |
A device positioning support for selectively positioning a device in one of a plurality of positions comprising a base, a pair of links which are each connected to the base and to a device, a manually operable self-locking release comprising a biasing member which normally biases a first constraint connected to one of the links into engagement with a second constraint connected to the other link in order to prevent relative movement of the links. The release is manually operable to relieve the biasing force and thereby permit relative movement between the first link relative to the second link in order to reposition the device.
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