DIN EN 61212-1-2007
基于热固树脂的电气用工业刚性圆形层压管和棒材.第1部分:定义、名称和一般要求
Insulating materials - Industrial rigid round laminated tubes and rods based on thermosetting resins for electrical purposes - Part 1: Definitions, designations and general requirements (IEC 61212-1:2006); German version EN 61212-1:2006