... 5: Break 五一假期 5: Problems of Strong State 强国家的问题 5: Economic/Financial Crises I: Reasons 经济/金融危机之一：原因 ...
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Because of the over state standard problems of COD and chromaticity remaining after coagulating drilling sewage, other strong measures of treating sewage were needed.
由于钻井污水经混凝处理后仍存在COD、色度超标问题，因此需采用其他方法深度处理污水。
The article introduces current state of the integral waterproofing and insulation roofing system at home and abroad, and analyses its strong points and problems in popularization.
介绍了国内外硬泡聚氨酯防水保温一体化屋面系统的应用情况；分析了该屋面系统的优势及推广中存在的问题；
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