据了解，该30辆旅游大巴车厢外均新增应急阀。应急阀分别位于车前门和车后门两侧，呈圆形，罩有一层玻璃挡板。遇到突发事故时，车外人只需稍微用力向内按动，玻璃罩即可弹开，按顺时针转动旋钮，大约10秒钟左右，车门内气体放光，乘客只需轻轻给力，就可推开车门逃生。

It is understood,This 30 a tour bus car outside all new emergency valve.Emergency valve located in car front door and back door on both sides of the car,Assumes the circular,Cover with a layer of glass damper.Meet when sudden accident,The car a stranger just a little force inward press,The glass can flick,According to clockwise rotating knob,About 10 seconds,The gas emission,Passengers gently only to force,Can be opened the door to escape.