The application of polycrystal mullite fibre in heating furnace is introduced.It can prolong the working life of roof and wall of furnace.是什么意思_The application of polycrystal mullite fibre in heating furnace is introduced.It can prolong the working life of roof and wall of furnace.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句