本标准定义了用于航空应用喷雾雾化器分类的雾滴尺寸类别， 相对于指定的参考平面风扇喷嘴，该喷嘴排放到高速气流中，从而增强 模拟空中应用条件的雾化。分类的目的是为喷嘴用户提供 提供液滴大小信息，用于做出应用决策，以满足农药产品标签和其他要求 与飞机喷洒农药有关的监管要求。

This Standard defines droplet size categories for the classification of aerial application spray atomizers, relative to specified reference flat fan nozzles discharging into a high-speed air stream, which enhances atomization simulating aerial application conditions. The purpose of classification is to provide the nozzle user with droplet size information for use in making application decisions to meet pesticide product label and other regulatory requirements related to pesticide spraying by aircraft.