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5.If an overall pattern (sometimes circular lines) appears on the test surfaces, how would the inspector reprocess the test piece? 如果零件上出現遍及表面的顯示(有時是環形線),探傷者應如何重新處理試件? A.Retest at a higher amperage. 用較高的安培值重新磁化 B.Demagnetize 退磁 C.Retest at lower amperage 用較低的安培值重新磁化 D.Both A and B A和B
這題選什么啊 ???題目表達的是什么個意思啊 ? |