有效投影面積(EPA)是指從二維視角觀察到的三維物體的面積。在戶外照明的情境中,這一概念對於確定燈具(如燈桿或照明設備)能夠承受的風力至關重要。「EPA 的作用不僅在於確保抵抗風荷的穩定性,更在於優化設計以達到效率和安全性的平衡。」
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