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专业英语L5讲述
The distance between doors should be capable of accommodating the longest train of vehicles required to pass through the airlock. For higher pressure differentials, multiple doors also allow the pressure break to be shared between doors. LESSON 5 Mine Ventilation Systems The distance between doors should be capable of accommodating the longest train of vehicles required to pass through the airlock. 风门之间的距离应能够容纳需要通过风闸的最长列车 For higher pressure differentials, multiple doors also allow the pressure break to be shared between doors. 压差高时,多层风门也使压力突变均分到各风门上。 Mechanized doors, opened by pneumatic[nju:m?tik] or electrical means are particularly convenient for the passage of vehicular[vi:hikjul?] traffic or where the size of the door or air pressure would make manual operation difficult. Mechanically operated doors may, again, be side-hinged or take the form of rollup or concertina[,k?ns?ti:n?] devices. LESSON 5 Mine Ventilation Systems concertina n.类似风琴的六角形的乐器 Mechanized doors, opened by pneumatic or electrical means are particularly convenient for the passage of vehicular traffic or where the size of the door or air pressure would make manual operation difficult. 由气动或电动开启的机械风门,对于车辆通行尤其方便。在风门尺寸大或空气压力大,手动操作困难的情况下,也使用气动或电动机械风门。 Mechanically operated doors may, again, be side-hinged or take the form of rollup or concertina devices. 机械风门也可以是一侧装铰链的形式,还可以作成卷帘门或折叠门。 They may be activated manually by a pull-rope or automatic sensing of an approaching vehicle or person. Large doors may be fitted with smaller hinged openings for access by personnel. Man-doors exposed to the higher pressure differentials may be difficult to open manually. LESSON 5 Mine Ventilation Systems They may be activated manually by a pull-rope or automatic sensing of an approaching vehicle or person. 它们可以通过人工拉绳,或自动感应接近的车辆或人员来启动。 Large doors may be fitted with smaller hinged openings for access by personnel. 大型风门安装有带铰链的小门供人员通行。 Man-doors exposed to the higher pressure dif
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