down draught producer

例句：

1. 1. Thedown draft producer is responsible for maintaining theairflow in the room.
   向下通风机制造者负责维护房间内的气流。
2. 2. The downdraft producer was designed to improve the efficiencyof the heating system.
   向下通风机制造者被设计用来提高供暖系统的效率。
3. 3. Downdraft producers are commonly used in industrial settingsto control dust and other particulatematter.
   向下通风机制造者在工业环境中常被使用来控制灰尘和其他颗粒物。