When it becomes necessary to examine the altitude performance of an aircraft engine, three types of facilities may be used-altitude wind tunnels, altitude test beds and flying test beds.

当需要考察一台航空发动机的高空性能时，可以利用三种型式的设备，即高空风洞、高空试验台和飞行试验台。

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Recently, Beijing city and other cities have already issued a related law prohibiting smoking in hospitals, kindergarten, daycare, middle school, public transportation and other types of facilities.

最近﹐北京市等城市已经颁布有关法律﹐禁止在医院﹑幼儿园﹑托儿所﹑中小学﹑公交车辆等八类公共场所吸烟。

youdao

Recently, Beijing city and other cities have already issued a related law prohibiting smoking in hospitals, kindergarten, daycare, middle school, public transportation and other types of facilities.

最近﹐北京市等城市已经颁布有关法律﹐禁止在医院﹑幼儿园﹑托儿所﹑中小学﹑公交车辆等八类公共场所吸烟。

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