One has the sense that the building expands and contracts, as the balconies slide in and out with alternate widths and depths.
营造出建筑扩张和收缩的感觉，随着阳台来回的滑动，产生了交替的宽度和深度。
It must have room for 4 paper widths between which the machine can alternate automatically, depending on the size of the mattresses to be packed.
一定要有足够的4卷纸的空间以便设备能够自动交替转换，由需要要包装的床垫的尺寸而定。
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