GB/T 19520.20-2023
ActiveMechanical structures for electrical and electronic equipment—Dimensions of mechanical structures of the 482.6 mm (19 in) series—Part 3-108: Dimensions of R-type subracks and plug-in units
电气和电子设备机械结构 482.6 mm(19 in)系列机械结构尺寸 第3-108部分:R型插箱和插件的尺寸