| 摘要 |
A rotatable load-handling clamp assembly has a rotation-stopping triggering assembly for automatically stopping clamp rotation at one or more predetermined stop positions. A hydraulic motor rotates a rotatable frame having clamp arms thereon with respect to a base. A hydraulic motor control system includes a switch and a set of triggering devices mounted in mutual opposition on the frame and base. The triggering devices are positioned to actuate the switch at the predetermined stop positions, and thereby automatically stop rotation of the hydraulic motor at such positions.
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