您要查找的是不是：
- mechamical ventilation 机械通气
- This is a room with good ventilation. 这是个通风良好的房间。
- The ventilation is poor, the lieutenant admits. 中尉承认，通风设备很糟糕。
- Workers should be allowed full ventilation of all their difficulties. 工人们应被允许公开讨论他们所有的困难。
- They altered the house to improve its ventilation. 他们把房子改装一下使它更通气。
- Regeneration production of ventilation fan. 换气扇的换代产品。
- Open the window for some ventilation. 打开窗子好通风。
- Well ventilation, away from corrosive gas. 通风良好，不带有腐蚀性气体。
- There was dead air due to the lack of ventilation. 因为没有通风这里的空气不流通。
- Ride the train to the ventilation shaft. 乘火车到达通风井找到柱状物体。
- Variable air volume(VAV) ventilation systems. 变风量通风空调系统。
- Necessary lighting and ventilation to be furnished. 应提供必需的照明和通风。
- Close all accommodation doors and shut ventilation. 关闭起居处所的门，切断通风。
- Fig. 3 Effect of up ventilation on greenhouse temp. 试验期间,试验温室停止上部2台风机的通风
- Do not place the product in a separate enclosure unless proper ventilation are provided. 除非通风良好，不要把产品放在独立的封闭装置中。
- They increased ventilation by opening the top center part of the carriage window. 他们把车厢上面的中央部分打开以增进空气的流通。
- My ventilation ducts will be too small to crawl through. 我所属的建筑物通风孔将会小到没有任何人爬的进去.
- Do not block or cover the ventilation slots and openings. 不要阻塞或覆盖通风槽或孔。
- The workers complained about the factory's lack of ventilation. 工人们抱怨工厂缺乏通风设备。
- By means of revamping double end seals washing system, damage of mechamical seal was decreased and operation life of pump was increased. 通过对双端面机械密封冲洗系统改造,减少机械密封损坏,提高泵的运行周期。
