point contact junction

例句：

1. 1. The devicehas a point contact junction at thecenter of its circuit board.
   该设备在其电路板的中心有一个点接触结点。
2. 2. Theresearcher found that the point contactjunction was responsible for the device'sfailure.
   研究人员发现，点接触结点是导致该设备故障的原因。
3. 3. In electronics, point contacts are used to connectwires together and transfer electrical signals.
   在电子学中，点接触用于连接电线并传输电信号。