Hi 各位老师好:
    以下有几个问题不明白,向各位老师讨教来了,请帮忙解决,谢谢!
     1.IPC-A-610E中的5.2.6焊接异常"退润湿"与D版本的"反润湿"是不是相同的定
义,只是叫法不同呢?还是有什么区别?
     2.子母板怎么理解?
     3.灌封怎么理解?

Best Regards,
Susie liao 
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