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。
In forced-air heating and cooling systems, ducts carry hot or cold air to different parts of home.
通风与空调系统中用于处理和输送空气的风管、风口、空气处理机组及其它部。
The air duct, air port, air handling unit and other parts are used to handle and transport air in heating, ventilation and air-conditioning systems.
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