Ключевые слова: abstract, background, blue, blueprint, cad, chalk, chalkboard, concept, connection, construct, construction, design, designer, desktop, display, draft, draw, drawing, education, element, engineer, engineering, equipment, graphic, idea, illustration, industry, mechanical, paper, pattern, plan, project, projection, ruler, schematic, scheme, school, screw, shape, sketch, steel, structure, studies, symbol, technical, technology, texture, tool, wallpaper,