环境箱可以通过使用液态氮加热组件或冷冻组件。

The chamber can heat the parts or freeze the parts using liquid nitrogen.

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通过对不同厚度淤泥水中氮营养盐的测定和分析，初步研究了不同厚度淤泥对水族箱水质环境中氮营养盐的影响。

This paper deals with the influence of a humus layer of different thicknesses on the water quality environment by measuring and analyzing the concentration of nitrogen nutritional salts.

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论文研究了一种新型污水生物处理工艺——多点交替进水五箱一体化活性污泥法除磷脱氮工艺。

Commutative multi-influent wastewater treatment processs with five tanks for nitrogen and phosphorus removal, a new developed process, consisted of five biochemical reaction tanks and a settling tank.

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