Maintain Higher Nitrogen Level 保持较高氮素水平
What you can do is try to maintain nitrogen balance.
你能做的就是尽量保持氮平衡。
A burner management system and a combustion control system are used to maintain low Nitrogen oxide and Carbon Dioxide emissions which are major environmental concerns.
燃烧器管理系统和燃烧器控制系统用于保持氧化氮和二氧化碳的低排放量，减少对空气的污染。
The apparatus applies a continuous supply of nitrogen to the load tap changer, and has an orifice to maintain a slight overpressure over an extreme range of climatic conditions.
该设备向有载分接头转换器连续地提供氮气，并具有通气孔，以保持略高于极端气候条件范围的超压。
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