With the comparison of the DVM system and the Frequency conversion multi connected system on energy cost characteristic, the energy saving effect of the DVM system is approved.是什么意思_With the comparison of the DVM system and the Frequency conversion multi connected system on energy cost characteristic, the energy saving effect of the DVM system is approved.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句