有什么用处
This thread has been locked.
If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.
地孔的话主要是接地,一般这种孔都打在铺好的的地线上,孔的两面都是地线,用这种孔相连,使得板子的地线回路更短,电阻更小,从而达到使板子有一个更稳定的地环境,增加线路的电磁稳定性。