微量氧化还原
micro oxidation-reduction
COD（化学耗氧量）
COD(chemical oxygen demand
HH-Ⅲ化学耗氧量测定仪
the HH-Ⅲ detector for chemical oxygen consumption
H H-Ⅲ chemical oxygen-consumption measurer
大气中二氧化硫含量检测仪
atmospheric sulfur dioxide detector
定量提取氧化还原过渡带
quantitative extraction of redox transitional belt
对流层垂直臭氧分布变化量
variation of the vertical distribution of the trop