In this paper, it is limited to discuss the ball type gover nor only and the block type governor may be analysed in same way.

由于篇幅所限，本文所涉及的仅为飞球式调速器；飞块式调速器的静力特性可依此类推。

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Aiming at the problem of large number of terrain data and low speed of terrain rendering, this paper presents a terrain rendering method based on data block and enclosing ball error metric.

针对大规模地形数据庞大、绘制速度慢的问题，提出一种基于数据分块和包围球误差函数的地形绘制方法。

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