Regardless of the type penetrant used, and regardless of other variations in the basic process, liquid-penetrantinspection requires at least five essential steps.
无论使用何种渗透剂，也无论在基本操作中其他的参数如何，渗透探伤都至少需要以下五个步骤。
2
All surfaces of a workpiece must be thoroughly cleaned and completely dried before it is subjected to liquid-penetrantinspection.