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Ultrasonicsoundsproducepulsedsignals,variousdefectsinmetalcanbedetected.是asaresultofwhich还是bymeansofwhich?网上说什么的都有.求句子翻译.

题目详情
Ultrasonic sounds produce pulsed signals,______ various defects in metal can be detected.
是as a result of which 还是 by means of which?网上说什么的都有.求句子翻译.
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答案和解析
Ultrasonic sounds produce pulsed signals, 【by means of which】 various defects in metal can be detected.超声波能产生脉冲信号,利用这一信号,金属中的缺陷可以被探测出来.利用信号能探测出金属中的缺陷,个人...