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A typical solar air heating system USES a dark colored, perforated aluminum sheeting on a south-facing wall.
一个典型的太阳能空气加热系统例子,是在朝南的墙上利用一个黑色,多孔铝薄膜。
youdao
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A typical solar air heating system USES a dark colored, perforated aluminum sheeting on a south-facing wall.
一个典型的太阳能空气加热系统例子,是在朝南的墙上利用一个黑色,多孔铝薄膜。
youdao