Pressurized ventilator( air feed) and smoke extraction fan are interlockingly controlled.

加压送风机（补风）与排烟风机联锁控制。

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In addition to JTB series Roots blower, our company also produces and sales low-noise DT tank centrifugal fan, T35/BT35, T30 axial fans, CF more airfoil centrifugal fan and axle roof ventilator.

我公司除生产销售JTB系列罗茨风机外，同时还生产销售DT低噪声柜式离心风机、T35/BT35、T30轴流风机、CF多翼型离心通风机及DWT型轴流式屋顶通风机等。

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Frequency conversion control system of local fan of ventilator was introduced in this paper.

介绍了井下通风局扇的变频控制系统。

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