The quality is a burnt magnesia spinel brick made from fused magnesia, low iron sintered magnesia and fused hercynite.This synthetic hercynite is a patent by RHI Refractories.是什么意思_The quality is a burnt magnesia spinel brick made from fused magnesia, low iron sintered magnesia and fused hercynite.This synthetic hercynite is a patent by RHI Refractories.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句