美利体育登录入口官网:MSZ EN IEC 61109:2025
绝缘子 额定电压大于1000V的交流系统的复合悬式和耐张绝缘子 术语、试验方法和验收要求(IEC 61109:2025)
Insulators for overhead lines. Composite suspension and tension insulators for a.c. systems with a nominal voltage greater than 1 000 V. Definitions, test methods and acceptance criteria (IEC 61109:2025)