n. termipoint
misc. wiring point
每边有3个接线点。
连接线称为弧，笛卡尔坐标系统中的点称为节点。
The connecting lines are arcs, and the points within the Cartesian coordinate system are nodes.
最后，通过提供Panel图来设置画布的内容，其中包括到目前为止您已经准备好的所有的点和连接线。
Finally, set the contents of the canvas by providing the Panel figure, which contains all the dots and connecting lines you have prepared so far.
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