摘要阐明了制定燃具氮氧化物排放标准的必要性,并就如何制定标准提出了意见。The necessity of establishment of the national standard of NOx emission is expatiated, and suggestions on how to establish it have been presented.
10Li Guo-jun. Theoretical research and practice on coal mine methane extraction and ground development design [ J]. Procedia Earth and Planetary Science, 2009, 1:94 --99.