ratio of heat to electricity
price ratio of electricity to gas
ratio of heat to humidity
comparision of quantity of electricity
quantity of heat of Yunnan
determinator of ratio of specific heat of gas
Energy-saving ratio of heat recovery
Invariability of Ratio of Areas
load ratio of heat and moisture
location heat consumption ratio coefficient
price ratio of electricity and heat
Quantity ratio of Si and Al
ratio of electricity and quality
ratio of heat and humidity
ratio of heat load to power