自从70年代世界性能源危机以来,节能问题日益受到人们的重视。在我国,能源一直是国民经济发展的一个制约因素,节能研究更具有紧迫性和现实意义。现在,气动技术已广泛应用于各个工业部门,成为传动和控制的最重 Since the world energy crisis of the 1970s, the issue of energy saving has drawn more and more attention. In our country, energy has always been a limiting factor in the development of the national economy. Energy-saving research is more urgent and practical. Now, pneumatic technology has been widely used in various industrial sectors, becoming the most important drive and control