The shape types of precursory anomalies from the absolute geomagnetic measurement are summarized and the study on the shape types of non-precursory anomalies is emphasized.

文中对地磁绝对测量前兆异常形态类型作了进一步的总结，着重研究了非前兆异常形态的类型。

youdao

The carrier magnetic disturbance which make magnetic deviation of the navigation equipment and influence geomagnetic measurement precision has been a difficult problem at all times.

载体磁场对地磁测量的干扰，一直是造成导航设备罗差、影响地磁测量精度的技术难题。

youdao

The carrier magnetic disturbance which make magnetic deviation of the navigation equipment and influence geomagnetic measurement precision has been a difficult problem at all times.

载体磁场对地磁场的干扰，一直是影响导航罗差、地磁测量的技术难题。

youdao