Ключевые слова: adjustable, applying, burner, construction, contractor, copper, end, engineering, fitting, fix, gas, hands, heating, home, house, industrial, job, maintenance, metal, pipelines, pipes, piping, plumber, plumbing, professional, renovation, repairing, repairman, solder, soldering, spanner, system, tools, tube, using, welding, worker, working,