GB/T 19520.15-2009电子设备机械结构.482.6mm(19in)系列机械结构尺寸.第3-104部分:基于连接器的插箱和插件的接口尺寸Mechanical structures for electronic equipment - Dimensions of mechanical structures of the 482.6 mm (19 in) series - Part 3-104: Connector dependent interface dimensions of subrack