this paper illustrates the principle of coal underground gasification and analyses the influence of some important variable on quality of product gas, as well as the relationship between variable.
本文阐述了煤炭地下气化的原理,并分析了主要变量对煤气质量的影响及各变量之间的关系。
the coal underground gasification technique belongs to a kind of adopting the coal method specially, it belong to nations found.