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
H H-Ⅲ chemical oxygen-consumption measurer
the HH-Ⅲ detector for chemical oxygen consumption
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