IEC 61820-1:2019-Electrical installations for aeronautical ground lighting at aerodromes-Part 1: Fundamental principles, IEC 60641-3-1:2008-Pressboard and presspaper for electrical purposes-Part 3: Specifications for individual materials-Sheet 1: Requirements for pressboard, IEC 60601-2-28:2017-Medical electrical equipment-Part 2-28: Particular req… Read More