change over valve meaning in Chinese

变换阀
转换阀

Thirdly , the proportional electromagnetism of the change over valve is introduced in terms of principle , type of action and characteristics
然后介绍了电空转换阀核心技术比例电磁铁的原理、作用方式、特点等。
Also , the system is compared with the existing emu brake control system . the key part of this system , the electro - pneumatics change over valve , had been analyzed and discussed
并与现有使用的动车组制动控制系统进行了对比、分析，并对其关键技术电空转换阀进行了分析讨论。