您要查找的是不是：
- main return air current 主回风流
- Fast driving method of west main return air roadway in Shihe mine 寺河矿井西总回风大巷快速施工法
- Hinged type return air louvre, model ARLH. ARLH型风口属可开式侧壁格栅风口。
- A glider buoyed by air currents. 通过流浮在水面上的滑翔机
- Faulty air current under the licker in, cylinder &doffer. 刺辊、锡林和道夫下的气流流通不好。
- The defoliation was buoyed up by a rising air current. 那片落叶被一股上升的气流浮起。
- A goose's wings churn the air and leave an air current behind. 一只大雁的翅膀扇动空气，在身后留下一股气流。
- The falling leaf was buoyed up by a rising air current. 那片落叶被一股上升的气流浮起。
- The ground always releases heat, making turbulent air current. 地面经常释放热量，造成有湍流的空气流动。
- My vacation begins next week. I've got a return air ticket to my hometown. 我下周休假,已经买好了回家乡的往返机票。
- At this time there can only be 1 Zone Mixer in a Zone Return Air Path. 这种情况下一个区域回风路径只能有一个区域混风器。
- Its main return circuit adopts thyristor contactless switch,so can turn off circuit quickly,precisely and reliably. 该系列点焊机主回路均采用晶闸管无触点开关，电路关断时间快、准确、可靠。
- If the plane drops suddenly,it is probably an air pocket (air current ). 如果飞机突然下落，可能是碰到了气阱(气流)。
- Birds use warm air currents to help their flight. 鸟利用暖气流助飞。
- If the plane drops suddenly, it is probably an air pocket (air current ). 如果飞机突然下落，可能是碰到了气阱(气流)。
- Therefore please do not delay the matter,and let us have the sale note and the other document per return air mail. 因此，请尽速办理，并航寄上述销售确认书及其他证件。
- YDetermine system efficiency by comparisons of return air and delivery temperatures. 通过比较新风和回风的温度,确定系统的效率。
- The Zone Return Air Path lists the Zone Mixer and Zone Return Plenum components comprising the path. 区域回风路径列出了区域混风器和区域回风静压箱组件，这些组件构成了该路径。
- For a typical single duct air system there will be one zone supply air path and one zone return air path. 对于典型的单管空调系统，一般由一条区域送风路径和一条区域回风路径组成。
- Building humidification may not be required if return air contains sufficient humidity to satisfy winter requirement. 如果回风含有足够的湿度来满足冬季需求的话，建筑则不需要加湿。
