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1.The engineer designed the ductuli biliberi to distribute air evenlythroughout the room.
工程师设计了管道来均匀地分配空气。
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2. The new ventilationsystem uses ductuli biliberi to improve indoor air quality.
新的通风系统使用管道来改善室内空气质量。
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3. Theductuli biliberi were installedin the ceiling and connected to the airconditioning unit.
管道被安装在天花板上，并与空调单元连接。