the ratio of air to fuel
the ratio of fuel to water
optimizing ratio of air to fuel
The air of the workplace
the ratio of air and wastewater
the ratio of air quantity and water volume
the ratio of the circumference of the diameter
the ratio of the densities of the misfit dislocati
the ratio of the intermediate principal stress
the ratio of the organs to body
the ratio of the price and the quality
the ratio of the rate coefficient
the ratio of the triple-harmonic in first-harmonic
ratio of air to coal amount