Therefore no guiding magnetic field is required.
它不需要引导磁场。
A proper profile can reduce the requirement of the guiding magnetic field, it is advantageous to realize the high power microwave devices packed by permanent magnet.
因此适当的磁场位形可以降低微波器件对导引磁场的要求，有利于实现永磁包装微波器件。
The numeric solutions on magnetic field of plane helix was solved by MATLAB, it helps to design radial guiding magnetic in engineering.
利用MATLAB数值求解了密绕平面螺线外的磁场分布，所得结论对于工程上径向导引磁场的设计具有重要的参考价值。
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