emissionn.散发;发行;排放
emission cell外光电效应光电管,发射光电管
emission pump电子泵
emission bill排放清单
emission edge发射界限
emission peak发射峰
emission band放射频带,发射谱带
emission scan发射扫描
emission area发射面积
emission line发射谱线
emission laws排放规律