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目前,用于评定电阻点焊质量的基本方法仍然是破坏性试验。超声波检测是已取得某些成功的焊缝无损检测方法之一。而电阻检测法是最近出现的一种无
At present, the basic method used to assess the quality of resistance spot welding is still a destructive test. Ultrasonic testing is one of the successful methods of non-destructive testing of welds. The resistance test is a recent appearance of nothing