直接火焰 meaning in Chinese

direct flame

Ambient air - determination of total non - methane organic compounds - cryogenic preconcentration and direct flame ionization detection method
周围空气.全部无甲烷有机化合物的测定.低温预浓缩和直接火焰电离探测法
Nmoc standard test method for determination of non - methane organic compounds in ambient air using cryogenic preconcentration and direct flame ionization detection method metric
利用低温预浓缩和直接火焰检测法测定周围空气中非甲烷有机化合物