本文中的建议和示例 出版物可适用于所有类型的离心机， 管道式或非管道式轴流风机和混流风机 用于供暖、通风和通风的装置 调节、机械通风、工业过程、， 排气、输送、干燥、空气清洁、灰尘 收集等，尽管在 一般意义上的参考是 由风机处理的介质，除 本出版物的范围包括空气。声音、振动和应力水平的测量 不在本出版物的范围内。

The recommendations and examples in this publication may be applied to all types of centrifugal, axial, and mixed flow fans in ducted or nonducted installations used for heating, ventilating, air conditioning, mechanical draft, industrial process, exhaust, conveying, drying, air cleaning, dust collection, etc. Although the word air is used when reference is made in the general sense to the medium being handled by the fan, gases other than air are included in the scope of this publication.Measurement of sound, vibration, and stress levels are not within the scope of this publication.