Ключевые слова: arc, architect, blue, blueprint, bow, centre, circle, compass, contractor, curve, cyanotype, describe, design, designer, distance, divide, divider, dividers, draft, draftsman, draught, draw, drawing, education, engineer, engineering, equipment, graphite, instrument, isolated, lead, locus, mark, measure, middle, pair, professional, scribe, slide, spring, stationery, study, technical, technology, tool, vintage, work,