DIN EN 61797-1:1997
电信和电子设备变压器和感应器.线圈架主要尺寸.第1部分:叠层铁芯线圈架
Transformers and inductors for use in telecommunication and electronic equipment - Main dimensions of coil formers - Part 1: Coil formers for laminated cores (IEC 61797-1:1996); German version EN 61797-1:1996