optimum air to coal ratio

TAR tissue to air ratio

air to air heat recovery unit

air to air missile launching envelope

air to air system

air ratio

air to surface area ratio

air to water ratio

Contribution ratio to Hydrocarbon-generating

eccess air ratio

excess air ratio

Lump coal ratio

optimizing ratio of air to fuel

primary air ratio

ratio of air to oil

ratio of air to water

ratio of burning air to oil

ratio of cumulative air to water injected

ratio of injected air to produced oil