The color aberration of POM after UV ageing , thermal ageing and hot water ageing for 1000 hours are 5.9, 6.land 4.8, smaller than 34.5, 7.6 and 20.2, which are the value of unmodified POM .是什么意思_The color aberration of POM after UV ageing , thermal ageing and hot water ageing for 1000 hours are 5.9, 6.land 4.8, smaller than 34.5, 7.6 and 20.2, which are the value of unmodified POM .在线翻译_英语_读音_用法_例句