How should trouble spot do at the chemistry of leak of poisonous and harmful gas?
Protective respiratory tract can use wet guaze mask, wet towel, protective skin can use boots of raincoat, glove, rain and sheet. Protective eye can use natant dive lens, mouth transparent polybag. To side wind or side windward direction moves ionization quickly to learn trouble spot. Be checked to medical treatment branch when necessary or make a diagnosis and give treatment.
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