高层建筑的防排烟系统是一项重要的消防安全技术设施。火灾时，它对阻止烟火蔓延和侵袭疏撒通道，保证建筑内的人员安全撤离，保证消防人员迅速扑灭火灾，具有重要的作用。我省防排烟系统的检验合格率已由１９９４年的５０％提高到现在的８０％左右。虽合格率逐年提高，但... The smoke prevention system of high-rise buildings is an important fire safety technology facility. In the event of a fire, it plays an important role in preventing the spreading of smoke and fire and invading the channel, ensuring the safe evacuation of people in the building and ensuring that the firefighters quickly extinguish the fire. The inspection pass rate of the smoke control system in our province has increased from 50% in 1994 to around 80% now. Although the passing rate increases year by year, but...