284.That portion of the system used to induct and distribute air Includes equipment rack cooling

systems and items such as blowers, scoops, ducting, inlets, check valves, etc Does not include valves which are part of pressurization and temperature control( )

　系统中用来引导和分配空气的部分。包括设备架冷却系统和项目,如鼓风机、喷头、管道、进口、单向活门等,不包括增压和温度控制部分的活门。

　系统中用来通风和分配空气的部分。包括电子舱冷却系统和项目,如鼓风机、喷头、管道、进口、单向活门等,不包括增压和温度控制部分的活门。

　系统中用来引导和分配空气的部分。包括设备架冷却系统和项目,如排气扇、漏斗、管路、进气道、单向活门等,不包括空调和温度控制部分的活门。

正确答案：A

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284.That portion of the system used to induct and distribute air Includes equipment rack coolingsystems and items such as blowers, scoops, ducting, inlets, check valves, etc Does not include valves which are part of pressurization and temperature control( )