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| dye penetrant inspection (一种针对金属或塑料部件表面缺陷而进行的无损检验。部件首先被浸人到渗透液中,然后将其表面的渗透液冲洗掉。接着部件表面被覆盖上显影粉,显影粉将渗透剂从部件表面缺陷处吸出，渗透剂就会在覆盖着显影粉的表面上清楚地显示出来，从而勾勒出部件表面的所有缺陷) | |||
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