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声波探测仪
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声波探测仪
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sonic detector
声波探测仪
通过向岩体、岩石、混凝土等发射声脉冲,接收声场经介质传播的声波信号,并分析介质的时间、能量、频率等声波变化的观测仪器。
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community physical fitness guidance station
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Community Research and Development Information Service of European Commission
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