The staircase method, combined with the main emission factors of the equipment, was used to analyze the CO2 emission of depreciation of manufacturing machinery.
利用折旧法中的楼梯法，再结合设备的主要组成物质的排放因子，初步分析了机械设备在折旧过程中排放的CO2量。
Main results for this study are as follows: 1. The study on methane emission law of wetland rice-duck complex ecosystem.
主要研究结果如下。1 .湿地稻-鸭复合生态系统甲烷排放规律的研究。
The main influence of emission on human being and environment is introduced in this paper. The foreign technical countermeasures to reach ULEV's requirements are stated.
本文介绍了汽车排放对人类和环境的主要影响以及国外为达到超低排放目标所采取的技术对策。
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