| 摘要 |
Movable pulley head assembly for a lateral spreader movement, where the lateral movement of the spreader is carried out directly on hoist pulley assemblies, the assembly including structurally rigid bridges where a beam of the bridge is long enough for the travel of the mechanism, cross members attached to pulley heads, where each cross member supports a bridge at each end by means of elements allowing relative movement between bridge and cross member, where the cross members can be extended outside the bridges to serve as support for other elements or mechanisms, the assembly further including worm screws for the lateral movement of the spreader.
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