关风门，速关气门，速关档板 quick closing: 速闭的automatic closing fire damper: 自动关闭防火挡板isolation damper closing mechanism: 隔离阻尼器闭合机构quick action closing device: 快速关闭设施quick closing door: 速闭门下载手机词典可随时随地查词查翻译
