地面上空 meaning in English
hemisphere
Examples
- The source of the primary electromagnetic energy must, for reasons of safety, be from 200 to 500ft above ground surface .
为了安全起见，初始电磁波的源必须位于地面上空200500英尺范围内。 - The source of the primary electromagnetic energy must , for reasons of safety , be from 200 to 500ft above ground surface
为了安全起见，初始电磁波的源必须位于地面上空200 ? 500英尺范围内。 - The source of the primary electromagnetic energy must , for reasons of safety , be from 200 to 500ft above ground surface
为了安全起见，初始电磁波的源必须位于地面上空200 500英尺范围内。 - Primarily used for aviation safety purposes to monitor low level winds in the first few kilometres from the surface , a wind profiler was installed in hong kong in 1996
天文台于一九九六年购置了一台气流剖析仪，主要用于监测地面上空数公里的风向和风速，以保障飞行安全。