All development wells of liwa n will be permanently installed with surface direct-reading subsurface pressure gauge and thermometer to support gas reservoir management and production optimization.

荔湾所有的开发井都将安装永久式的地面直读井下压力和温度计，为气藏管理和生产优化提供支持。

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The study of nitrogen balance in stock farming system is the basis of nutrient management in animal husbandry production, and the determination of N cycling parameters is the foundation of this study.

畜牧系统中N流动与平衡的研究是畜牧业进行养分资源管理的基础，而参数的确定又是研究养分循环与平衡的基础工作。

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