KS C IEC 61261-2-2018 电子设备用压电陶瓷滤波器IEC电子元器件质量评定体系（IECQ）规范第2部分:分规范合格审定
Piezoelectric ceramic filters for use in electronic equipment ― A specification in the IEC quality assessment system for electronic components (IECQ) ― Part 2: Sectional specification ― Qualification