GB/T 19520.21-2023
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3-109部分:嵌入式计算设备的机箱尺寸
Mechanical dimensions of electrical and electronic equipment 482.6 mm (19 in) series mechanical dimensions Part 3-109: Chassis dimensions of embedded computing devices
GBT19520.21-2023, GB19520.21-2023