Ключевые слова: 3d, arrow, art, atom, background, barrel, biology, business, chemistry, color, colorful, contour, contract, design, dna, document, dollar, drop, element, finance, fuel, gas, gradient, icon, illustration, increase, industry, isolated, isometric, line, linear, lineart, medicine, molecular, molecule, money, oil, outline, paper, payment, pen, petroleum, power, price, science, sign, structure, symbol, technology,