边界扫描技术越来越重要了，这大家都明白，但它是如何工作（原理）的呢？想必不是每一个人都明白的。现在这个能帮助大家学习边界扫描。- The boundary scanning technology has been more and more important, this everybody understood, how but is it works (principle)? Thought is not each people all understands. Now this can