IEC 60050-561:2014/AMD4:2021
修改件4.国际电工词汇(IEV).第561部分:频率控制、选择和检测用压电、介电和静电器件及相关材料
Amendment 4 - International Electrotechnical Vocabulary (IEV) - Part 561: Piezoelectric, dielectric and electrostatic devices and associated materials for frequency control, selection and detection