Ключевые слова: blurry, bolts, central, certified, circulation, closeup, connection, control, copper, faucet, flow, flowing, fluid, gas, gauge, handle, heat, house, indoor, industry, instalation, invent, iron, kitchen, knob, knobs, manifold, metal, natural, off, pipe, pipes, plumber, plumbing, power, pressure, propane, regulate, shutoff, solder, steam, steel, tube, tubing, turn, valve, yellow,