Ключевые слова: accuracy, aggregate, blueprint, blueprints, caliper, callipers, circle, circles, closeup, compass, cross, design, detail, diagram, diameter, document, drafting, drawing, engineer, engineering, fragment, frame, gear, geometry, grey, image, industrial, industries, instrument, machine, manufacturing, measurement, measuring, mechanical, mechanism, metal, paper, pattern, pencil, plan, plant, projecting, radius, range, ruler, scheme, set, sketch, technical, tool,