| 摘要 |
The invention provides a lifting apparatus for a projecting system. The lifting apparatus according to the invention includes an adjustable lifting device and a controlling device. The adjustable lifting device is used for moving a housing of the projecting system. The controlling device is coupled to the adjustable lifting device, and used for accessing, responsive to a request signal, a height datum to control the adjustable lifting device to move the housing of the projecting system in accordance with the accessed height datum.
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