单词：brown coal
brown coal的用法和样例：
例句
- The methods of making solid coal sorbent and liquid gelsorbent from lignite are also discussed in this paper.列举了由褐煤制取固体煤质吸附剂和液体凝胶吸附剂的方法。
- TheASTM rankings for bituminous coal, sub-bituminous coal, or lignite fit the spreader combustion process well.美中试验材料协会根据煤在燃烧时的性能把煤分为烟煤，次烟煤，褐煤几个等级。
单词：brown coal 相关文章
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实用英语
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