air to water ratio

air ratio

ammonia burning ratio

air to surface area ratio

airoil ratio

air fuel ratio

catalyst to oil ratio

high ratio of catalyst to oil

burning loss ratio

Air Leakage Ratio

Air Fuel Ratio Control

air void ratio

Day to day ratio

air fuel ratio in theory

air leaking ratio

effective air volume ratio

carbon to nitrogen ratio

acid to alkali ratio

Area ratio of Window to wall

amplitude to period ratio