铸造生产的两大污染源，一是使用含有有毒物质的树脂黏结剂，二是排放的废砂成为大量固体废物。
In foundry production, two great pollution sources are use of resin binders containing toxic matters and large amount of solid garbage resulting from waste sands.
介绍了一种以环氧树脂e - 44为原料制备煤岩光片黏结剂的新方法及应用。
A new method for preparing optical thin slice of coal maceral bonder made of epoxy resin E-44 and its application are introduced.
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