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按平面矢量分布的特征,将平面尺寸链区分为随机矢量平面尺寸链与有向矢量平面尺寸链两种类型,分别求得其计算式,并引入相应实例。
According to the characteristics of plane vector distribution, the plane size chain is divided into two types: random vector plane dimension chain and oriented vector plane dimension chain, and the formulas are respectively calculated and introduced into the corresponding examples.