Freelift是归因于叉车桅杆的尺寸。尺寸（h2）指定了在降低门架降低高度之前叉架上的最大提升量。该值对于确定高度受限或高架障碍物房间中的最大电梯高度很重要。

          Freelift is a dimension attributed to a forklift mast. The dimension (h2) specifies the maximum amount of lift at the fork carriage prior to a change in the lowered height of the mast. The value is important in order to determine the maximum lift height in rooms with restricted heights or overhead obstructions.