研究了两类电力系统：涡轮发电机轴系扭转系统和古典电力系统。

Two classes of power systems: Turbine-Generator shaft system and classical power system, are studied.

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存根发电机，   例如，属于这一类。

Stub generators, for example, fall into this category.

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存根发电机，   例如，属于这一类。

Stub generators, for example, fall into this category.

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