water-level receiver 水位传感器

low-level receiver 低电平接受器

level tracing receiver 电平直观仪

receiver threshold-signal level 接收机门限电平

threshold level of FM receiver 调频接收机门限电平

water-level detector receiver 水位传感器

receiver noise power level 接收机噪声功率电平

internal receiver noise level 接收机内噪声电平

receiver noise level 接收机噪声级

threshold-signal level of receiver 收音机门限电平