墩差测量和仪器比测是地磁观测中最基本的工作，直接影响到观测资料的质量和使用价值。
The pilar difference measurement and instrument comparison is basic to the quality and usage of the recorded geomagnetic data.
仪器用于高精度岩石磁性测量及古地磁标本测量。
The instrument can be employed in high-precision magnetic measurement of rocks and paleomagnetic measurement of samples.
仪器用于高精度岩石磁性测量及古地磁标本测量。
The instrument can be employed in high-precision magnetic measurement of rocks and paleomagnetic measurement of samples.
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