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.