... 链;键;连接;滑环：link 练习本装订的切边：binders waste 联结器;偶联管;轴接;偶联：coupling ...
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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.
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。
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