Ключевые слова: background, bolt, brass, bush, bushing, cap, connector, copper, different, equipment, external, female, fitting, group, head, hexagonal, inner, internal, iron, isolated, jack, lot, male, many, metal, nobody, nut, part, pipe, plug, plumbing, repair, screw, service, sleeve, steel, stud, supply, technology, thread, tool, tube, union, water, white,