airborne magnetometric gradiometer

例句：

1. 1. The airborne magnetometric gradiometer was used to measure the magneticfield around the Earth's surface.
   航空磁测仪被用来测量地球表面周围的磁场。
2. 2. The airborne magnetometric gradiometer was used to detect the presence ofunderground water.
   航空磁测仪被用来探测地下是否有水。
3. 3. The airborne magnetometricgradiometer was used to monitor themagnetic activity in the region.
   航空磁测仪被用来监测该地区的磁活动。