Ключевые слова: background, brass, connection, construction, copper, coupling, engineering, equipment, fitting, fittings, gas, gold, golden, heavy, hydraulic, industrial, industry, installation, isolated, joint, material, metal, metallic, nipple, nipples, part, pipe, plumber, plumbing, repair, screw, sleeve, steel, tee, thread, tool, tube, union, water, white, yellow,