For many decades, even after being exposed to the elements, zinc galvanizing has protected your steel heating and cooling ducts.

镀锌表皮暴露在自然环境中，但它几十年来还是很好地保护了负责加热或冷却的钢制管道。

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Additional bracing, extra cooling ducts and special aerodynamics are fitted to the Super Sport, so that safety and stability are not sacrificed for top speed.

此外，还配备了额外的支撑装置，冷却管道和特殊的空气动力学系统。所以，威龙的高速并没有以牺牲安全性和稳定性为代价。

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In forced-air heating and cooling systems, ducts carry hot or cold air to different parts of home.

在强制热风和冷风系统中，通风管道将热空气的冷空气输送到家里不同的地方。

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This is because most of the area under their floors was taken up by their fuel cells and the massive cooling ducts meant to keep them from overheating.

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Current HVAC systems get rid of stale, germ-ridden indoor air by cooling or heating fresh outdoor air and blowing it through ventilation ducts, a process that gobbles electricity.

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