positive pressure control

例句：

1. 1.The positive pressure control system is designed to prevent the spread of airborne diseases.
   正压控制系统旨在防止空气传播的疾病传播。
2. 2.In the event of a fire, the positive pressure control valves are activated to maintain a safe level of oxygen in the room.
   发生火灾时，正压控制阀门被激活以保持房间内安全水平的氧气。
3. 3. The positive pressure control system is crucial for ensuring the safety of personnel working in hazardous environments.
   正压控制系统对于确保在危险环境中工作的人员的安全至关重要。