Ключевые слова: adjustable, adjusting, assistance, brazing, central, circulation, connecting, connection, domestic, dual, energy, equipment, fitting, fix, heat, heater, heating, home, hot, house, hpiece, installation, installing, modern, new, pipeline, pipes, plastic, plumber, plumbing, repair, repairman, service, soldering, supply, system, thermal, tube, valve, water, welder, welding,