摘要
本文首先简介了该课题及其实验设备，测试过程，接着，经过对部分实验结果的分析讨论，得到了一些初步结论．
The study and its experiment equipment experiment precess were introduced,some experiment data were analyzed and some intial results were listed in this paper.
关键词
双降膜
邻二氯苯
对二氯苯
结晶
分离
熔融结晶
double falling film
fractional crystallization
para-ortho rdichlorobenzene
