求翻译：热机是将热能转换为机械能的机器。历史上对热机循环过程及热机效率的研究，曾为热力学第2定律的确立起了奠基性的作用。斯特林1816年发明的空气热机，以空气作为工作介质，是最古老的热机之一。虽然现在已发展了内燃机，燃气轮机等新型热机，但空气热机结构简单，便于帮助理解热机原理与卡诺循环等热力学中的重要内容，是很好的热学实验教学仪器。是什么意思？

Heat engine is converted to mechanical energy to heat the machine. History of the heat engine cycle and heat engine efficiency research, who established the laws of thermodynamics 2 played a foundational role. 1816 Stirling heat engine invented by air to the air as the working medium, is one of the

Thermal energy is converted into mechanical energy Thermal engine machine. History, to the thermal Engine cycle and thermal engine efficiency research, he was the second law of thermodynamics has established the role of laying. stirling 1816 invention of the air thermal engine to air as a working me

The heat engine is transforms the heat energy into the mechanical energy machine.In the history to the heat engine cycle process and the heat engine efficiency research, once for thermodynamics 2nd law establishment laid a foundation the function.Sterling in 1816 invented the air heat engine, by the

Heat engine is a machine that converts thermal energy to mechanical energy. History of heat engine cycle and study on efficiency of heat engines, who has established the foundation of the 2nd law of thermodynamics. Stirling invented in 1816 by air heat engines, using air as the working fluid, is one

The thermal engine changes the heat energy into the machine of the mechanical energy. The study on cyclical process of the thermal engine and thermal engine efficiency in history, once functioned as sex of laying a foundation for the establishment of the second law of thermodynamics. Strean 1816 inv