Ключевые слова: adjusting, apparatus, autonomous, circulation, closeup, closing, connection, control, device, drain, energy, engineering, equipment, factory, faucet, fitting, flow, flowing, gas, gate, handle, heat, heater, hot, industrial, infrastructure, knob, large, pipe, pipeline, pipes, piping, plumbing, pump, supply, system, tap, thermal, tube, tubing, turning, utilities, valve, water, water main, water supply, water valve, wheel, working,