由于大量原材料，如用于装饰庙宇的半宝石石料、建造屋顶的木材和所有金属都需要进口，贸易变得至关重要。
Trading was important, as so many raw materials, the semiprecious stones for the decoration of the temples, timbers for roofs, and all metals, had to be imported.
所有材料来源都很简单：立面和屋顶表面是外绘纸板瓦楞金属板。
All materials are of simple origin: facade and roof surfaces have corrugated metal sheets on the outside and painted cardboard plates on the inside.
构件由钢筋混凝土制成，同时顶楼屋顶由填充了隔热和隔音材料的金属板制成。
The structural elements are made of reinforced concrete while the roof on the top floor is made from metal sheets filled with heat and acoustic insulation.
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