介绍了地磁场模型误差的主要来源。
The main error sources in the geomagnetic field model were introduced, too.
国际地磁参考场与局部地磁场模型的研究，具有深远的学科意义与巨大的实用价值。
The researches on international geomagnetic reference field model and regional geomagnetic field model have profound scientific significance and are of great practical value.
国际地磁参考场与局部地磁场模型的研究，具有深远的学科意义与巨大的实用价值。
The electric current passing through the conductor on the film of bubble generates a local magnetic field gradient to make the bubble propagate.
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