Lastly, the measurements of the cigarette filter ventilation and pressure drop were taken using a KC3 combined dilution/pressure drop instrument (Borgwaldt-KC, Richmond, Virginia, USA).
最后，采用结合稀释/压力差仪器（美国弗吉尼亚时士满Borgwaldt-KC）的KC3进行香烟过滤器和压力差的测量。
The risk was greater when high flow oxygen therapy and positive airway pressure ventilation was used.
进行高流量氧气和正压通气能增加传播的风险。
Natural ventilation in heated pressure occupies a more and more important position in the building ventilation design because of being free from outside factor influence.
而热压作用下的自然通风方式因不受外界因素的影响在建筑通风设计中占据越来越重要的地位。
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