Ключевые слова: and, bar, black, block, board, bolts, build, clamp, clamped, connected, connector, construct, construction, coupler, coupling, development, engineering, erection, frame, framework, grip, industrial, industry, iron, link, metal, new, pipe, pole, preparation, project, rods, safe, scaffold, scaffolder, scaffolding, screw, site, staging, steel, structure, support, swivel, temporary, thread, tightened, tower, tube, white, working, workplace,