光化学活性碳氢化合物 photochemically reactive hydrocarbons 排放浓度 concentration of emission 排气有害成分 poisonous exhaust composition ..
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composite concentration of exhaust emission 综合排放浓度
emission concentration of air pollutants 大气污染物排放浓度
concentration of dust emission 烟尘排放浓度
The excitation spectrum of SSA changes when its concentration is relatively higher, but the emission spectrum remains unchanged.
SSA浓度较高时，荧光激发光谱发生变化，但发射光谱不变。
This chapter describes methods of estimating airborne pollutant concentration distributions associated with various emission sources.
本章论述几种有关各种排放源的大气污染物浓度分布的估算方法。
The results show that the alarm time depends strongly on both the gas concentration and the emission current of the ionization gauge.
实验数据还表明，快速报警响应时间与气体分子浓度和真空计规管灯丝的发射电流密切相关。
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