Ключевые слова: accident, acid, arm, assistant, burn, care, caution, chemical, chemicals, chemistry, corrosion, corrosive, danger, dangerous, dead, durable, environment, factory, glove, hand, hazard, hazardous, health, help, hydroxide, industry, lab, label, laboratory, liquid, nitric acid, plastic, poison, poisonous, potassium, pour, prevent, protector, quality, reaction, resistant, risk, safety, skin, substance, symbol, test, toxic, warning, water,