• 1. inverted flat roof: 倒置的平屋顶
• 2. inverted d flat roof: 倒置的平屋顶

• 1.Structurally, the roof form consists of simple "a" frame trusses inverted to form a flat roof, each truss individually supported by a steel column.
  在结构上，屋顶形状由简单的“A”形框桁架结构组成，框桁架倒置形成平屋顶，每个桁架分别由一根钢柱支撑。
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