BS EN 60893-3-4:2004 绝缘材料.电工用热固性树脂基工业硬质层压薄板.单项材料规范.酚醛树脂基硬质层压薄板要求
Insulating materials - Industrial rigid laminated sheets based on thermosetting resins for electrical purposes - Specifications for individual materials - Requirements for rigid laminated sheets based on phenolic resins