低分子量的胺是合成含氮有机化合物的重要原料。
Low molecular weight amines are important raw materials for synthesis of nitrogen_containing organic compounds.
煤中的低分子化合物一般是指分散于煤的高分子主体结构中的分子量小于500的有机化合物。
Low molecular weight compounds of coal is generally defined as those organic compounds with MW below 500 destributing in skeleton structure of coal macromolecular material.
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