A systematic study of hexafluoroacetone hydrate has been carried out by introducinggas chromatograph, mass spectroscopy and nuclear magnetic resonance spectroscopy.
本文采用了气相色谱、色质联用及核磁共振法等分析方法对六氟丙酮水合物进行系统的研究。
2
By introducing some ways of ammonia and sulphur removal, some processes were put forward for coke oven gas purification.
通过介绍几种脱氨和脱硫方法，提出了几种可供选择的焦炉煤气净化工艺。
3
The article summarizes main points of electronic identification system designing in gas pipe network by introducing constitutes, working principle, and characteristics.