KS C IEC 61261-1-2018 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1部分:总规范鉴定批准
Piezoelectric ceramic filters for use in electronic equipment — A specification in the IEC quality assessment system for electronic components (IECQ) — Part 1: Generic specification – Qualification ap