Ключевые слова: background, ball, bathroom, black, brass, conduit, connection, copper, culvert, drain, engineering, equipment, faucet, fitting, flowing, gas, handle, industrial, industry, isolated, leak, metal, off, pipe, pipeline, plumber, plumbing, pressure, red, regulator, sanitary, spigot, stopcock, supplies, system, tap, threaded, tube, tubing, valve, water,