Polypropylene added with this IFR possessed excellent flame resistance properties. The experiment results show that the limiting oxygen index (LOI) , smoke density rank (SDR), and UL-94 of flame retarded PP are 33. 6, 44. 25,and UL94V-0.是什么意思_Polypropylene added with this IFR possessed excellent flame resistance properties. The experiment results show that the limiting oxygen index (LOI) , smoke density rank (SDR), and UL-94 of flame retarded PP are 33. 6, 44. 25,and UL94V-0.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句