Ключевые слова: beaker, blue, bunsen, chemical, chemical plant, chemistry, classes biology volume, clear, color, color image, educational subject, experience, flask, glass material, green, group of objects, high angle view, horizontal, laboratory, laboratory equipment, laboratory glassware, liquid, measuring, medical test, no people, research, research centre, science, science and technology, test tube, toxic, tube, tubing, violet,