thin line vector icon set - hook vector, gears, sewerage, construction helmet, working oil derrick, valve, hydroelectric station, power line, industrial building, pipes, robot welder, calipers Shutterstock .eps vector - thin line vector icon set - hook vector, gears, sewerage, construction helmet, working oil derrick, valve, hydroelectric station, power line, industrial building, pipes, robot welder, calipers - ID: 1389847229