Ключевые слова: actuator, alarm, alignment, arrow, bell, caution, colorful concrete, conduit, connection, crisscross, emergency, equipment, faucet, fire, fire fighting, fire safety, fire sprinkler, firefighting, fittings, flange, flow, gauge, hazard, hose, industry, instrument, intricate, joint, line, measurement, meter, parallel, pattern, pipe, pipeline, red, resources, row, safety, sprinkler, sprinkler system, supply, system, tap, technology, tube, utility, valve, wall, warning, water,