| 摘要 |
An adjustable support device includes a support, a lift mechanism, and a pulley unit. The support includes at least two casings which are slidably connected with each other so as to adjust the length of the support. The lift mechanism includes a threaded rod screwed into a nut for changing the distance between the casings. The pulley unit is adapted for driving the casings. The present invention provides a labor-saving effect for operation.
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