本标准定义了喷嘴分类的液滴光谱类别，相对于规定的参考风扇喷嘴，将喷雾排放到静态空气中，或没有气流增强雾化。分类的目的是向喷嘴用户提供液滴尺寸信息，主要用于指示场外喷雾漂移的可能性，其次用于应用效果。

This Standard defines droplet spectrum categories for the classification of spray nozzles, relative to specified reference fan nozzles discharging spray into static air or so that no stream of air enhances atomization. The purpose of classification is to provide the nozzle user with droplet size information primarily to indicate offsite spray drift potential and secondarily for application efficacy.