IEC TR 60297-3-1:2023
电气和电子设备的机械结构.482.6mm(19in)系列机械结构的尺寸.第3-1部分:技术方案和应用
Mechanical structures for electrical and electronic equipment - Dimensions of mechanical structures of the 482,6 mm (19 in) series - Part 3-1: Technological schemes and applications