ruumiline maht mõõtetingimustel jagatud ajaga, quantity equal to the volume dV of substance crossing a given surface during a time interval with infinitesimal duration dt, divided by this duration, thus qV = dV / dt, flow rate in which the quantity of fluid is expressed as volume, volume at metering conditions divided by time, voolava keskkonna vookogus, mis on väljendatud mahuna, ajaühikus läbiv vedeliku maht