GB/T 19290.5-2009 发展中的电子设备构体机械结构模数序列 第2-3部分：分规范25 mm设备构体的接口协调尺寸扩展的详细规范 插箱、机箱、背板、面板和插件的尺寸

GB/T 19290.5-2009 Modular order for the development of mechanical structures for electronic equipment practices—Part 2-3:Sectional specification—Interface co-ordination dimensions for the 25 mm equipment practice—Extended detail specification—Dimensions for subracks,chassis,backplanes,front panels and plug-in units