而特征多项式的系数与有向图的圆族有着密切的关系。

And the coefficients of eigen-polynomial expressions were closely related to the circular sets of a directional graph.

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立柱的外圆上设有一导 向长槽，在导向长槽的槽底加工有二个分别设置的小凹槽。

The outer circle of the vertical pole is provided with a guiding elongated slot, and the slot base of the guiding elongated slot is processed with two small grooves which are respectively arranged.

youdao

立柱的外圆上设有一导 向长槽，在导向长槽的槽底加工有二个分别设置的小凹槽。

The outer circle of the vertical pole is provided with a guiding elongated slot, and the slot base of the guiding elongated slot is processed with two small grooves which are respectively arranged.

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