IEC 61253-1:1993
压电陶瓷谐振器 IEC 电子元件质量评估体系 (IECQ) 规范 第1部分:通用规范 资格批准(1.0 版)
Piezoelectric ceramic resonators - A specification in the IEC quality assessment system for electronic components (IECQ) - Part 1: Generic specification - Qualification approval (Edition 1.0)