Regardless of the type penetrant used, and regardless of other variations in the basic process, liquid-penetrant inspection 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。
All surfaces of a workpiece must be thoroughly cleaned and completely dried before it is subjected to liquid-penetrant inspection.
工件的所有表面都必须被彻底清理，并且在进行渗透探伤前应完全干燥。
All surfaces of a workpiece must be thoroughly cleaned and completely dried before it is subjected to liquid-penetrant inspection.
工件的所有表面都必须被彻底清理，并且在进行渗透探伤前应完全干燥。
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