Gas detectors for continuous operations (used to detect the chemicals with export control or organic compounds (containing phosphorus, sulfur, fluorine or chlorine, with the concentration lower than .3mg/m3), or detect the activity of inhibited cholinest 用于連續操作的氣體檢測器(可用于出口管制的化學品或有機化合物(含有磷、硫、氟或氯,其濃度低于0.3mg/m3)的檢測,或爲檢測受抑制的膽堿酯酶的活性而設計),