毕业了

**[稀土离子交换沸石荧光粉研究](http://www.slideshare.net/yijian166/ss-13161905 "稀土离子交换沸石荧光粉")**
View more [PowerPoint](http://www.slideshare.net/thecroaker/death-by-powerpoint) from [yijian166](http://www.slideshare.net/yijian166)

答辩ppt~·~