NF C26-166-3-2-2006
绝缘材料.电工用热固性树脂工业硬质圆形层压管和棒.第3部分:单项材料规范.活页2:圆形层压模制管
Insulating materials - Industrial rigid round laminated tubes and rods based on thermosetting resins for electrical purposes - Part 3 : specifications for individual materials - Sheet 2 : round laminated moulded tubes.