应用衍生气相色谱法测定含氟稀土精矿焙烧逸出气体中的氟化物。
Derivative gas chromatography is used to analyze the fluorinated compound derived from the gas out of the rare earth concentrates containing fluorine.
可是，称为热量及逸出气体分析仪的科学仪器探测到，没有足够的物质落入烘箱，所以烘箱门没有关闭。
But the science instrument, called the Thermal and Evolved-Gas Analyzer, detected that not enough material fell inside and so the oven doors did not close.
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