| 摘要 |
A clamp for use in stage lighting and similar applications comprises a main body portion which is provided with a pair of wheels and an arm mounted on the main body portion provided with a pair of wheels . A locking handle is pivotally mounted on the arm and is arranged to move the arm between a closed position in which the wheels are engageable with a bar or rail and an open position in which the wheels are clear of the bar or rail. A bolt or screw is secured to the arm and is adapted for attachment to the clamp of a lantern.
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