The coil converts the current into a powerful magnetic field.

线圈则产生强烈的磁场。

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Therefore the magnetic field analysis as for the drive coil is necessary.

因此，对于驱动线圈的磁场分析是必要的。

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Therefore the magnetic field analysis as for the drive coil is necessary.

因此，对于驱动线圈的磁场分析是必要的。

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