DIN EN IEC 61300-3-21:2021
光纤互连设备和无源元件. 基本试验和测量程序. 第3-21部分: 检查和测量. 切换时间(IEC 61300-3-21-2019); 德文版 EN IEC 61300-3-21-2019
Fibre optic interconnecting devices and passive components - Basic test and measurement procedures - Part 3-21: Examinations and measurements - Switching time (IEC 61300-3-21:2019); German version EN IEC 61300-3-21:2019