The operation principle and features of a new type HVDC insulation monitoring system were introduced.A scheme of HVDC system earth-fault detection was presented.是什么意思_The operation principle and features of a new type HVDC insulation monitoring system were introduced.A scheme of HVDC system earth-fault detection was presented.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句