本应用指南旨在让读者熟悉空气幕装置（ACU）技术。本文件涵盖ACU理论、结构、性能标准、应用、优点、选择、安装、调试、服务和维护。

The purpose of this application guide is to familiarize the reader with air curtain unit (ACU) technology.This document covers ACU theory, construction, performance standards, applications, benefits, selection, installation, commissioning, service and maintenance.