natural draft ventilation

The feasibility of applying natural draft ventilation in Taopinghe phosphate mine was studied from bath aspects in theory and practice .

从理论和实践两方面分析了桃坪河磷矿采用自然通风的可行性。

For the same reason, the top of the buildingwas designed to work as a chimney draft, in order to get a highly efficient natural ventilation system.

同样，工作室顶部被设计成像烟囱通风那样，以此来达到更高效的通风效果。

This kind of boiler without mechanical ventilation of blowers and induced draft fans is distinguished as natural draft boilers.

这种不采用鼓、引风机机械通风的锅炉，称之为自然通风锅炉。