本文利用四层模式，讨论了ME型行星际磁场螺旋扇形过渡区的稳定性。

By using a four-layer model, the stabilities of ME type spiral sector transition region in the interplanetary magnetic field are discussed.

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本文采用六层模式，讨论了MD型行星际磁场螺旋扇形过渡区的稳定性。

By using a six-layer model, the stabilities of MD type spiral sector transition region in the interplanetary magnetic field are discussed.

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