The conventional sulfur removal process for desulfurizing crude ammonia from wastewater stripping can not meet the demand of chemically clean ammonia.
炼油厂合硫污水经汽提获得的粗氨经常规的氨精制工序达不到化工用氨的要求。
He intends to use a chemically unusual form of iron to clean water up, not make it dirty.
他将利用铁原子的一种非通常化学形态来净化水源，而非污染水源。
These pumps are suitable for clean or polluted liquids, cold or hot, chemically neutral or corrosive liquids.
适用于输送清洁或污染的、低温或高温的、化学中性或腐蚀性的液体。
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