Qingzang railway lies in Qingzang highland, where environment is vulnerable, and wastewater discharge standard is strict.

青藏线地处青藏高原, 生态环境十分脆弱, 污水排放要求高.

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There were two problems that flue gases entrained water and flue dust concentration exceeded discharge standard.

某热电厂尾部烟气的湿法除尘装置存在严重的烟气带水和烟尘排放浓度超标问题.

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