| 摘要 |
<p>A movable base (4) is adapted to pivot about first pivotal shafts (Sx ...), a panel holder (6) configured to hold a panel (2) is pivotally connected to the movable base (4) through second pivotal shafts (Sy...) perpendicular to the first pivotal shafts (Sx...), and a holder drive mechanism (5) arranged on the movable base (4) is configured for the panel holder (6) to pivot about the second pivotal shifts (Sy...).
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