分单元介绍了对引进煤气净化技术的认识、 消化及改进情况，总结了几年来对工艺技术的理解和实践经验。
The study, digest and improvement of imported gas purifying technique are introduced, the understanding of technology and technique and practical experience in recent years are concluded.
介绍了用于合成气、城市煤气及CO_2等净化过程的脱硫剂及脱硫技术。
A description is given to the desulfurizer and desulfurization technology used in the purification process of synthesis gas, town gas and CO_2 etc.
通过解读文献来分析煤气的生产、净化、储存和传输，以及煤气灯的形制等方面的理论和技术内容。
Through all these literature, the author analyses many important links of the coal gas production, the purification, the storage, the transmission as well as the gas lamp production at that time.
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