顾名思义，托盘被存放两层。提供50％的单个负载访问权限-先进先出。良好的空间利用率。通过减少所需过道的数量来增加存储容量。卡车装有伸缩叉或受电弓叉机构。
As the name implies, pallets are stored two deep. Offers 50 % individual load access - First In Last Out. Good space utilisation. Storage capacity is increased by reducing the number of aisles required. Truck is fitted with telescopic or pantograph fork mechanism.
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