“long path differential optical absorption spectrometer”的概念、定义、翻译、参考文献-科学参考

单词	long path differential optical absorption spectrometer
释义	long path differential optical absorption spectrometer Encyclopedia 工学长光程差分吸收光谱仪释 long path differential optical absorption spectrometer长光程差分吸收光谱仪使用氙灯作为光源，采用收发一体的卡塞格林望远镜接收经大气吸收过的反射光的远程测量设备。测量的是一段光程（200～1000米）内污染气体成分的平均浓度。
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