热机效率 meaning in English

efficiency of heat engine

Heat engine efficiency in elliptical reversible cycle of ideal gas
理想气体的椭圆形可逆循环过程的热机效率
The computational method of efficiency of heat engine on elliptical reversible ideal gas
椭圆形可逆循环过程的热机效率计算
Relationship between the efficiency of heat engine and cyclic direction of the irreversible heat engine
不可逆热机的热机效率与循环方向的关系