这些可能是不可取的，一定水质要求。
These may be undesirable for certain water-quality requirements.
超超临界机组对锅炉补给水有很高的水质要求。
USC units require higher water quality to boiler make-up water.
我国现行生活饮水卫生标准，对供水单位提出了更高的水质要求。
The existing drinking water health standards propose higher requirements on water supply units.
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