vacuum pressure manometer for measuring installed in water or gas systems. focus on the pressure gauge

wheel hand blue watch machine lighting iron circle clock electronics vehicle gadget drink gauge drum organ light bottle vacuum pressure manometer measuring installed water gas systems focus plumbing equipment fittings pipes faucets manufacturing safety scale indicator bar gauges process air fluid material risk background object closeup compression control energy engineering factory industrial industry instrument measure measurement metal meter oil pipe pipeline piping plant power pump science steel system technical technology tool valve systems