青云翻译

(2) is not useful in volatile chemicals, low concentrations of explosive gases and gases with low ignition point materials and toxic substances training.

2. false for volatile chemicals, low concentrations of explosive gases and low ignition point gas training items, as well as toxic substances.

2. Not practical in easy volatile chemical reagent, low concentration detonating gas and low kindling point gas goods as well as virulent goods raise.

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2. false for volatile chemicals, low concentrations of explosive gases and low ignition point gas training items, as well as toxic substances.