Taking the NJ1061 and NJ1041 trucks as examples, the designing method of a roofventilator fora sealed cab is presented.
以NJ 1061、NJ 1041等车型为例，介绍了密封型驾驶室顶通风口的设计方法。
2
The Church is naturally ventilated, with fresh air supplied at floor level, and exhausted through a continuous roofventilator.
教堂内设有自然通风系统，新鲜空气从地层进入，并由屋顶的抽风机排出室外。
3
After a presentation of the construction and moving paths, a kinematic equation for roofventilator is given, and its components structurally designed based on analysing the parameters.