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研制了一种补风式排烟罩。
加压送风机（补风）与排烟风机联锁控制。
Pressurized ventilator( air feed) and smoke extraction fan are interlockingly controlled.
利用热风系统作为中心区域补风，改善主生产区空气质量。
Using hot blast system to supply air to the center region, the air quality in the productive area has been improved.
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