The NO x removal is a difficult problem in air pollution control.

There were no x' s.And that is kind of good news.

没有x，这是好消息。

Influence of Coal Volatiles Compositions on NO x and SO x Emissions

煤的挥发份组分对NO x和SO x排放的影响

Progress of SO 2 and NO x removal from flue gas by pulse corona discharge

脉冲电晕法脱硫脱硝研究概述

Experimental Study on Reduction of NO x Emissions from Internal Combustion Engine by ACF

用活性碳纤维净化发动机排气中NO x的试验研究

Fuel staged combustion is an extensively applied effective method of reducing NO x emissions.

燃料分级燃烧是目前广泛采用的降低NOx排放的有效方法之一。

NO x Formation and Control Technology in the Combustion Process

燃烧过程NOx的生成及控制技术

The combustion measures with high effciency and low NO x were analyzed and researched.

对高效低NOx燃烧措施进行了分析研究。

Development trend of low NO X emission technologies has been discussed.

介绍了有关国家民用燃气氮氧化物的排放标准，讨论了低氮氧化物燃烧技术的发展趋势。

Crop residue is the main source of SO 2 and NO x emissions;

秸杆是SO2和NOx排放的最主要来源，薪柴次之；

Numerical Simulation of the NO x Emissions from A Tangential Firing Pulverized Coal Boiler

四角切圆煤粉锅炉中NO x生成的数值模拟

Impact of Staged Combustion on Formation of NO x and Combustion Economics

分级燃烧对NO x生成及燃烧经济性的影响

Study of the NO x Discharge Characteristics of Large Lean and Bituminous Coal Boilers

大型贫煤和烟煤锅炉NO x排放特性的研究

The NO x in atmosphere is the international environmental protection problem that be concerned at large at present.

大气中氮氧化物（NOx）是目前国际上普遍关心的环境保护问题之一。

Review of Removal SO 2 and NO x by Electron Beam

电子束脱除SO2和NO x的概述

Research of catalytic reduction of NO x by lower hydrocarbons under lean burn conditions

贫燃条件下低碳烃催化还原NO x研究进展

Contribution of NO x to Acid Rain in Minnan Area

氮氧化物在闽南地区酸雨中的贡献

Development of Selective Reduction Catalysts for Removal of NO x in Combustion Gas

燃烧尾气中NO x选择性还原反应催化剂研究进展

Reduction of NO X Pollution from Gas fired Industrial Furnace

减少燃气工业炉NO X污染的技术和实践

The NO x emission concentration is increased along with the augmentation of coal nitrogen content.

随着煤粉含氮量的增加，NOx的排放浓度也在增加；

Study of Low NO x Burning Technology for Tangential Boiler

切向燃烧锅炉低NOX燃烧技术研究