The PWT heating unit of the DWE product line represents the most important building block of the heating installation.Mineral or synthetic oil can be employed as the thermal transfer medium.是什么意思_The PWT heating unit of the DWE product line represents the most important building block of the heating installation.Mineral or synthetic oil can be employed as the thermal transfer medium.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句