天棚表面温度略大于地板表面温度；
The surface temperature of the ceiling is more than that of the floor.
天棚表面与室内环境之间的辐射换热量大于对流换热量，舒适度好。
Radiant heat is more than convective heat transferred from the radiant ceiling to indoor, so the comfortable degree in the building is high.
随着建筑技术的飞速发展，现代建筑物应满足净高、大跨度、大空间、天棚表面平整、间隔灵活、视觉开阔等要求。
With the rapid developing of construction technology, modern buildings should fit the requirements of net height, large span, large space, smooth sunshade, free interval, open vision, and etc.
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