It studied the inflaming retarding and smoke suppressing mechanisms through the limiting oxygen index(LOI),the char yield test,smoke density rating(SDR),maximum smoke density(MSD),and SEM.是什么意思_It studied the inflaming retarding and smoke suppressing mechanisms through the limiting oxygen index(LOI),the char yield test,smoke density rating(SDR),maximum smoke density(MSD),and SEM.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句