very large scale integrated circuit 超大规模集成电路 very low frequency emission 甚低频发射 very low frequency radiation 甚低频辐射 ..
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Cloge detection system of pigging and extrusion tools is adopting very-low-frequency radiowave emission and reception.
清管及挤涂工具的阻卡探测系统是采用甚低频无线电波发射、接收。
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