The pattern of aeration duct plays an important role in the efficiency and uniformity of mechanical aeration utilization for grain storage.

通风地槽的形式对粮仓机械通风的效率和均匀性等设计指标具有重要作用。

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Result the incidence of the VAP had close relation with the patient's age, aeration time, virulence operation and the disinfection management of the ventilator duct.

结果呼吸机相关性肺炎的发生与病人年龄、通气时间、侵入性操作以及呼吸机管道的消毒管理有着密切的关系。

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