NAS 风道剖视，硬盘与后风扇一眼看懂

A four-bay desktop NAS concept shown as one cutaway isometric 3D object, four drive trays in front, motherboard on the side and one large rear exhaust fan. A few translucent cool-blue airflow arrows enter the front and exit the back without obscuring parts. Pale neutral background, physically plausible spacing, no text, educational concept not measured thermal simulation. Original generic design, no real brand or fabricated specifications.

四盘位桌面NAS的单体等距3D剖视图，前方四个盘架、侧面主板与后方一个大排风扇。少量半透明冷蓝气流箭头从前到后，不遮零件。浅中性背景，间距可信，无字，教学概念而非实测热模拟。 原创通用设计，不虚构真实品牌参数。