求翻译：折叠式或带滑轮的家具可以节约空间，给家中变换样子时也很方便。比如带脚轮的小书柜，平时可以放在书房，有三五好友来聚会时我们就会把它推到客厅当临时小酒柜。而沙发旁两个边桌也是带脚轮的，拼在一起可作餐桌用，不用时可以分别放在沙发两侧。据说，带脚轮的桌椅可以降低人们对用餐区面积的要求。是什么意思？

Folding or furniture saves space with a pulley, to transform the way time is also very easy. Such as the small bookcase on castors, usually in a study, 35 friends to the party we will push it to the living room when a temporary small wine Cabinet. And two side table beside the sofa is also on castors, fight together for the dinner table, on both sides when not placed on the sofa. It is said that chair castors can reduce people's requirements in dining area.