The factors of flammability testing of no-halogen flame-retardant PE were investigated by testing methods of the oxygen index and the smoke density.是什么意思_The factors of flammability testing of no-halogen flame-retardant PE were investigated by testing methods of the oxygen index and the smoke density.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句