Ключевые слова: abstract, arrow, background, blank, bolt, border, box, comment, concept, creative, cross, design, direction, element, empty, enter, frame, gray, hardware, head, message, metal, note, object, outline, perforated, pointer, red, remark, rivet, scratches, screws, shape, sheet metal, sign, silver, steel, style, symbol, web, white, write down,