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- This paper discussed methane emission,the reasons for methane reduction in up corner,problems should be considered in the condition of change from normal ventilation into downriver ventilation. 对下行通风时瓦斯涌出及下隅角瓦斯减少的原因进行论证,对上行风改为下行风应注意的问题进行了论证。
- Practice of Downriver Ventilation Technology in Retreat Simple Longwall 后退式回采工作面下行通风技术的应用
- Swam downriver; a downriver canoe race. 向下游游泳; 顺流独木舟赛
- downriver ventilation 下行风
- This is a room with good ventilation. 这是个通风良好的房间。
- Sightseers drifted downriver on a raft. 观光客们乘着木筏漂向下游。
- Downriver racing has no such niceties. 顺流竞速没有那么严格。
- 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。
- And about 100 miles downriver, evacuations are underway in Grafton. 在河流下游约100英里处的格拉弗顿，人们正在被疏散。
- There was dead air due to the lack of ventilation. 因为没有通风这里的空气不流通。
- Flood fears in the Midwest are now moving downriver. 中西部洪灾的恐惧正往河流下游移去。
- 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。
