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- Analyzes the problems of ammonia and nitrogen emission and COD exceeding the standard during urea production,solves the problems through such measures as technical revamp and strengthening management. 针对尿素生产过程中,氨氮排放和COD易超标的问题进行了分析,通过技术改造、加强管理等措施,解决了排放超标问题。
- Spectral measurement of nitrogen emission behind normal shock wave 激波波后氮分子发射光谱的测量
- By 2005, China will be integrated environment-water pollution, and through engineering measures for the chemical oxygen demand and ammoniac nitrogen emissions reduced by 10%. 到2005年，中国将对受到污染的水环境进行综合整治，并通过工程措施使化学需氧量和氨氮的排放总量削减10%25。
- Air consists chiefly of nitrogen. 空气主要由氮气组成。
- The emission of visible light by a hot object. 白热光物体遇热发出可见光
- Nitrogen forms most of the Earth's air. 地球上空气的大部分成分是氮气。
- The lamp is full of gaseous nitrogen. 灯里充满了气体氮。
- Nitrogen forms about 78% of the earth's atmosphere. 氮约占地球大气的百分之七十八。
- The amount or rate of emission or ejection. 排放量流量、流速，或排出量，排出的速度
- Nitrogen Emission 氮排放
- Emission and propagation of energy in the form of rays or waves. 发射以光线或波的形式发出和传播能量
- One set of provisions tightens emission standards. 一套使排放标准更加严格的规定。
- Will you sunder nitrogen from air? 你能从空气中把氮气分离出来吗?
- A brief, sudden emission of air, vapor, or smoke. 一阵烟空气、蒸汽或烟雾短促而突然的散发
- An example is the emission of light from matter. 物质的发光即为一例。
- Nitrogen is the most commonly used gas. 氮气是最常用的气体。
- Sample gas tubes are flushed with nitrogen. 采气管得用氮气吹扫。
- The main reservoir of nitrogen is the atmosphere. 氮的主要蓄存库是大气层。
- What is the percentage of nitrogen in air? 空气中所含的氮的比例是多少?
- More stringent fuel and vehicle emission standards. 收紧车用燃料及车辆废气排放标准。
