Ключевые слова: alcohol, beaker, biology, burner, chemical, chemistry, clock, contour, danger, equipment, experiment, explosion, fire, flame, flask, gas, glass, glassware, grey, hazard, hour, icon, illustration, isolated, laboratory, line, linear, liquid, medical, nuclear, outline, pharmacy, pollution, radiation, research, safety, sand, science, scientific, set, technology, time, toxic, tube, white, wick,