求翻译：这栋建筑的木制外壳重达20吨，最奇怪的是它可以在6分钟之内进行伸缩。当外壳收缩以后，房屋内部的第二层外壳就会显露出来，内壳层的制造材料是玻璃。木制外壳的收缩由一台电动机带动外壳底下的滑轮所完成。木制外壳的滑轮的工作原理与火车轨道相似，在滑轮之下有一组轨道。通过这种设计，房屋主人可以根据需要控制外壳的收缩程度，以调整室内的温度和光线。是什么意思？

Building a wooden shell weighing 20 tons, the most strange thing is that it can scale within six minutes. When the housing contraction, the second layer of the shell of the housing within the exposed inner shell of the material is glass. Contraction of the wooden shell driven by an electric motor pu

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The building of the wooden shell weighs 20 tons, the most strange is that it can be flexible in 6 minutes. When the shell after shrinking, housing the internal layer of the shell is exposed, and inner-shell material is glass. Shrinkage of wood shell consists of a motor-driven pulley under the shell

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